https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&user=162.158.202.226&feedformat=atomexplain xkcd - User contributions [en]2024-03-29T07:25:09ZUser contributionsMediaWiki 1.30.0https://www.explainxkcd.com/wiki/index.php?title=Talk:2178:_Expiration_Date_High_Score&diff=176894Talk:2178: Expiration Date High Score2019-07-19T15:34:34Z<p>162.158.202.226: </p>
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<div><!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--><br />
If we assume this comic is contemporary, i.e. the year she found the beans is 2019, it makes Randall's girlfriend/wife 37 years old.[[Special:Contributions/141.101.84.64|141.101.84.64]] 05:25, 19 July 2019 (UTC)<br />
:Well... it makes Megan 37 years old. There is nothing here to strongly suggest that cueball and her are Randall and his gf/wife. --[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 05:54, 19 July 2019 (UTC)<br />
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When I was working at a gas station, someone brought in a propane tank which had expired in 1963 (or so). If 1963 and using this scheme, my score would be 96.6.<br />
[[Special:Contributions/172.69.33.251|172.69.33.251]] 06:02, 19 July 2019 (UTC)<br />
<br />
Propane tanks do not "expire", that is they do not go bad with time, and you do not need to throw them out after the date. The date on these tanks is when they need to be inspected for damage, as mandated by Federal and state laws. If the tank passes inspection a new date in put on and you can keep using the tank (propane suppliers can legally keep refilling it.) [[User:Godzilla|Godzilla]] ([[User talk:Godzilla|talk]]) 13:40, 19 July 2019 (UTC)<br />
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: Except that it <q>must be something ''you'' purchased</q> so you can't use that one in the contest. Unless you then purchased it from whoever brought it in… <br/> I don't see any rule requiring that the item be new (or otherwise not-yet-expired) when you purchase it, so can we buy old things from other people in order to inflate our score (potentially over 100)? [[Special:Contributions/172.69.42.76|172.69.42.76]] 06:18, 19 July 2019 (UTC)<br />
::That also circumvents the argument "we moved since 2010". If you buy the apartment with kitchen and all equipment, you also purchased the expired item... --[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 06:20, 19 July 2019 (UTC)<br />
:::I think that part in the title text is referring to "how did we manage to not come across all of our expired items when we moved" rather than "this item was here before me moved in". Some very disorganised people might actually pack up and move all of the items (e.g. food) in their house without first checking or even noticing if it is expired. [[Special:Contributions/141.101.98.64|141.101.98.64]] 10:52, 19 July 2019 (UTC)<br />
::::That was my initial thought too, that she either did it without of noticing, or did not notice it on purpose, to at some point reach this score. But the loophole, good 'ol 42.76 brought up, put this idea up, as an alternative.--[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 10:56, 19 July 2019 (UTC)<br />
:The rules say that the item must be something you, personally '''''purchased'''''...so did they BUY the pickles from Megan's mom? I'd want to see a receipt or something! (And if the pickles were dated to 1978, Megan (whom we've established is 37 years old was not born when the pickles were dated...so for sure, this is cheating! [[User:SteveBaker|SteveBaker]] ([[User talk:SteveBaker|talk]]) 13:36, 19 July 2019 (UTC)<br />
::They clearly attribute the pickle score to Megan's mum, not to Megan.[[User:Bischoff|Bischoff]] ([[User talk:Bischoff|talk]]) 13:42, 19 July 2019 (UTC)<br />
:::Yeah - that makes more sense. I had initially read it as these were pickles MADE by her mum and given to Megan - not pickles that her mum purchased. Sadly, we can't work backwards from the 2030 date that Megan needs to wait until in order to beat that score to figure out her mom's age because we don't know on what year her mum discovered the ancient pickles. [[User:SteveBaker|SteveBaker]] ([[User talk:SteveBaker|talk]]) 13:48, 19 July 2019 (UTC)<br />
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There is one caveat to Megan's strategy: since the fraction (year you found item - year item expired)/(your age when you found it) converges to one as time goes on regardless whether the numerator is bigger than the denominator, as long as the item expired before the year of your birth, postponing the discovery reduces your score (considerably).<br />
<br />
== FOOD SCIENCE ==<br />
<br />
''"Since then many countries introduced laws and regulations requiring companies to put expiration dates on perishable goods. In some instances this can have the negative effect of people throwing out good food by blindly following the suggested expiration date. This behaviour can incentivise companies to adjust the expiration date so that people will re-buy the products sooner."''<br />
<br />
Since science and the truth are a big part of both xkcd.com and explainxkcd.com, I think it is important this explanation includes how/why food goes bad, and why expiration dates on jars/cans of food do not serve to protect people from eating bad food. If no one else gets to it first I'll try to type this explanation when I get a chance.<br />
<br />
Until then I don't think the explanation should say "...many countries introduced laws and regulations requiring companies to put expiration dates on perishable goods." Although this is true, it is also true many companies put expiration on non-perishable products even through there is no law requiring them to do so. Like cosmetics and jars of pickles. [[User:Godzilla|Godzilla]] ([[User talk:Godzilla|talk]]) 13:54, 19 July 2019 (UTC)<br />
<br />
:To be fair, many items are labelled "Best Before" or "Sell By" - implying that the food item will be edible for at least some time beyond that date. Actual expiration dates on preserved food items do seem to be rarer. There are cases of canned food items from the early 1900's still being in good shape after 100+ years - and those would not have had any expiration date. But one issue is that back then, cans were made by soldering sheets of tin together - and the lead in the solder slowly leaches into the food making it unsafe to eat even though the food itself seems well-preserved. So for potential high scores, we should look to: [http://mentalfloss.com/article/555075/11-oldest-foods-and-beverages-ever-discovered The 11 oldest foods and beverages ever discovered] - except that they'd not have any kind of formal expiration date. [[User:SteveBaker|SteveBaker]] ([[User talk:SteveBaker|talk]]) 14:10, 19 July 2019 (UTC)</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=Talk:1923:_Felsius&diff=148637Talk:1923: Felsius2017-12-02T23:09:06Z<p>162.158.202.226: </p>
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<div><!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--><br />
Thanks who, at the same time as I, wrote the better explanation with formulae; you're welcome for the table (which, for my first attempt at a MediaWiki table, and in a big hurry to be first*, I think came out all right). ((*Go ahead and edit at will!)) --'''BigMal''' // [[Special:Contributions/108.162.216.184|108.162.216.184]] 16:44, 1 December 2017 (UTC)<br />
<br />
Seems like this is awfully relevant: https://xkcd.com/927/ -- '''Derek Antrican''' [[Special:Contributions/108.162.246.23|108.162.246.23]] 16:54, 1 December 2017 (UTC)<br />
<br />
You can't write formulas like that! °C is degree(s) Celsius, not the value of some temperature as measured in degrees Celsius. You should write something like [°C] or °C<sup>-1</sup> instead (if we treat °C as an affine function mapping dimensionless values to temperatures). Or you can be explicit and say something like "x°F = ((x − 32) * 5 / 9)°C". --[[Special:Contributions/172.68.54.22|172.68.54.22]] 19:59, 1 December 2017 (UTC)<br />
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Fahrenheit contribution to the name is disproportionately small for an average of two scales. It should have been at least Falsius, with added punniness, or Fahlsius, to be more unique. -- '''Average Alex'''<br />
<br />
I'm obliged to share https://www.youtube.com/watch?v=227Hdz8VFKo. As a pedant, I have to point out that water's melting and boiling point aren't quite at 0 °C and 100 °C (and that Celsius originally had it backwards). And I *do* like "Falsius". [[User:Fluppeteer|Fluppeteer]] ([[User talk:Fluppeteer|talk]]) 21:19, 1 December 2017 (UTC)<br />
<br />
Watchout for Felsius/Celsius or Felsius/Fahrenheit hybrids: https://xkcd.com/419/ [[User:WhiteDragon|WhiteDragon]] ([[User talk:WhiteDragon|talk]]) 22:20, 1 December 2017 (UTC)<br />
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What is an "epislon"?<br />
[[Special:Contributions/162.158.88.170|162.158.88.170]] 23:02, 1 December 2017 (UTC)<br />
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I think the Ukranian Ye (Є) would be closer, visually speaking.[[Special:Contributions/162.158.186.42|162.158.186.42]] 23:40, 1 December 2017 (UTC)<br />
* Or the mathematical symbol ⋲ (ELEMENT OF WITH LONG HORIZONTAL STROKE) or C̶ (LATIN CAPITAL LETTER C + COMBINING LONG STROKE OVERLAY)? Or ℃̶ (DEGREE CELSIUS + COMBINING LONG STROKE OVERLAY)? [[User:Sabik|Sabik]] ([[User talk:Sabik|talk]]) 11:36, 2 December 2017 (UTC)<br />
<br />
Apparantly someone needs to be taught about the Rømer scale that is the ancestor of both Celcius and Fahrenhet. It has fixed constants for all three of water boiling, freezing and the temperature of brine.[[Special:Contributions/162.158.202.226|162.158.202.226]] 23:06, 2 December 2017 (UTC)</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=Talk:1923:_Felsius&diff=148636Talk:1923: Felsius2017-12-02T23:06:12Z<p>162.158.202.226: Rømer scale</p>
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<div><!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--><br />
Thanks who, at the same time as I, wrote the better explanation with formulae; you're welcome for the table (which, for my first attempt at a MediaWiki table, and in a big hurry to be first*, I think came out all right). ((*Go ahead and edit at will!)) --'''BigMal''' // [[Special:Contributions/108.162.216.184|108.162.216.184]] 16:44, 1 December 2017 (UTC)<br />
<br />
Seems like this is awfully relevant: https://xkcd.com/927/ -- '''Derek Antrican''' [[Special:Contributions/108.162.246.23|108.162.246.23]] 16:54, 1 December 2017 (UTC)<br />
<br />
You can't write formulas like that! °C is degree(s) Celsius, not the value of some temperature as measured in degrees Celsius. You should write something like [°C] or °C<sup>-1</sup> instead (if we treat °C as an affine function mapping dimensionless values to temperatures). Or you can be explicit and say something like "x°F = ((x − 32) * 5 / 9)°C". --[[Special:Contributions/172.68.54.22|172.68.54.22]] 19:59, 1 December 2017 (UTC)<br />
<br />
Fahrenheit contribution to the name is disproportionately small for an average of two scales. It should have been at least Falsius, with added punniness, or Fahlsius, to be more unique. -- '''Average Alex'''<br />
<br />
I'm obliged to share https://www.youtube.com/watch?v=227Hdz8VFKo. As a pedant, I have to point out that water's melting and boiling point aren't quite at 0 °C and 100 °C (and that Celsius originally had it backwards). And I *do* like "Falsius". [[User:Fluppeteer|Fluppeteer]] ([[User talk:Fluppeteer|talk]]) 21:19, 1 December 2017 (UTC)<br />
<br />
Watchout for Felsius/Celsius or Felsius/Fahrenheit hybrids: https://xkcd.com/419/ [[User:WhiteDragon|WhiteDragon]] ([[User talk:WhiteDragon|talk]]) 22:20, 1 December 2017 (UTC)<br />
<br />
What is an "epislon"?<br />
[[Special:Contributions/162.158.88.170|162.158.88.170]] 23:02, 1 December 2017 (UTC)<br />
<br />
I think the Ukranian Ye (Є) would be closer, visually speaking.[[Special:Contributions/162.158.186.42|162.158.186.42]] 23:40, 1 December 2017 (UTC)<br />
* Or the mathematical symbol ⋲ (ELEMENT OF WITH LONG HORIZONTAL STROKE) or C̶ (LATIN CAPITAL LETTER C + COMBINING LONG STROKE OVERLAY)? Or ℃̶ (DEGREE CELSIUS + COMBINING LONG STROKE OVERLAY)? [[User:Sabik|Sabik]] ([[User talk:Sabik|talk]]) 11:36, 2 December 2017 (UTC)<br />
<br />
Apparantly someone needs to be taught about the Rømer scale that is the ancestor of both Celcius and Fahrenhet. It has fixed constants for all four of water boiling, freezing, the temperature of brine and human body temperature.[[Special:Contributions/162.158.202.226|162.158.202.226]] 23:06, 2 December 2017 (UTC)</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=1906:_Making_Progress&diff=1470031906: Making Progress2017-10-23T17:12:20Z<p>162.158.202.226: Added a bit of explanation.</p>
<hr />
<div>{{comic<br />
| number = 1906<br />
| date = October 23, 2017<br />
| title = Making Progress<br />
| image = making_progress.png<br />
| titletext = I started off with countless problems. But now I know, thanks to COUNT(), that I have "#REF! ERROR: Circular dependency detected" problems.<br />
}}<br />
<br />
==Explanation==<br />
{{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br />
Megan has made progress. While she started the day with lots of problems, she has entered those problems into a spreadsheet. This could allow her to resolve her problems and fix them more quickly. The humor lies in that none of the problems have actually been solved.<br />
<br />
Title text is talking about how even her spreadsheet doesn't work because "#REF Circular Dependence detected" is an error meaning that a formula is using it's own cell in the equation. This would be because the error is now also a problem that needs to be counted. How the circular dependence started in the first place is not clear. There is also a possible pun on "dependency."<br />
<br />
==Transcript==<br />
:[Megan is looking at a computer.]<br />
:Megan: I started the day with lots of problems.<br />
:Megan: But now, after hours and hours of work,<br />
:Megan: I have lots of problems in a spreadsheet.<br />
{{incomplete transcript|Do NOT delete this tag too soon.}}<br />
<br />
{{comic discussion}}</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=1884:_Ringer_Volume/Media_Volume&diff=1448711884: Ringer Volume/Media Volume2017-09-01T19:22:55Z<p>162.158.202.226: </p>
<hr />
<div>{{comic<br />
| number = 1884<br />
| date = September 1, 2017<br />
| title = Ringer Volume/Media Volume<br />
| image = ringer_volume_media_volume.png<br />
| titletext = Our new video ad campaign has our product's name shouted in the first 500 milliseconds, so we can reach the people in adjacent rooms while the viewer is still turning down the volume.<br />
}}<br />
<br />
==Explanation==<br />
{{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br />
<br />
The {{w|Smartphone|smartphones}}, as of the time of publication of the comic, tend to have multiple system-level sound volume settings, such as, for example, phone call alarm volume, timed alarm volume, phone communication volume, and media volume, the last covering video, music, games and such. For comparison, personal computers running under recent versions of Windows operating system and such tend to expose the user to a master sound volume control by default, which affects all the sounds emitted by system. Applications that emit sound (other than basic interface sounds, such as clicking) tend to implement a separate volume control themselves.<br />
<br />
In addition, smartphones tend to have two dedicated hardware buttons for sound volume control that naturally map to raising and lowering sound volume. However they don't differentiate which of available volume controls user wants to adjust. Smartphone operating systems tend to resolve to adjust the volume level of currently emitted sound type, with some default in case of sound not playing, typically the phone call alarm (ringer). Adjusting arbitrary volume control is usually possible using system settings app controlled by touch screen, which can take more time than pressing dedicated buttons, and/or stop currently used program, depending on the smartphone in question.<br />
<br />
The comic demonstrates, using a time axis, a typical annoyance generated by this kind of setup. User wants to play a video clip but expects its sound volume, or sound volume of a preceding advertisement, to be louder than optimal, so they start to preemptively press button responsible for lowering sound volume. However, since video clip just started loading while user preemptively pressed the button, this leads to adjustment of phone alarm volume instead of media volume, which is not what was intended at all. User proceeds to raise the ringer volume and waits until the information box about ringer volume being adjusted disappears from screen, then tries again. This still doesn't work again, since video is still loading, and apparently needs to start emitting sound before possibility of adjusting that sound with volume buttons arises. This is exactly what eventually happens - the video starts uncomfortably loudly and user's delayed reaction while attempting to readjust ringer volume level leads, in fact, to ''raising'' the media volume. At this point, graph ends, though user is implied in the title text to proceed to reduce the video's volume directly afterwards.<br />
<br />
Despite most applications implementing separate sound controls, Windows has also been able to adjust volume on per-activity basis since at least Windows 95. You can access this feature on the most recent (as of 2017) version of Windows 10 by right-clicking the speaker icon on the tray, and selecting the "Open Volume Mixer" option. This setup is roughly equivalent to opening system settings on a smartphone, in that user can see multiple volume controls and select to adjust some. Additionally, some versions of Windows made the system tray volume control only affect the currently focused program, sort of analogously to described smartphone behaviour, in that a single interface area can correspond to different volume controls depending on the context. This feature has been however removed, presumably to reduce user confusion.<br />
<br />
The title text presents a method of exploiting the phenomenon presented in the main comic by putting important parts of an advertisement very early in the video clip in loud audio form. Since user may have problems with adjusting video sound volume before it starts playing, this will result in the important part of ad (here, product name) emitted very loudly, to the levels of narrator of title text expecting it to reach people in other rooms than one the smartphone is in.<br />
<br />
==Transcript==<br />
{{incomplete transcript|Do NOT delete this tag too soon.}}<br />
<br />
Trying to turn down the volume before a video starts playing:<br />
<br />
(A line graph is presented, with horizontal axis denoting "Time". There are two signed lines, "Ringer volume" and "Media volume". In addition there are two rows of drawings also aligned with time, one above the signed lines featuring drawings of two neighboring buttons, one below the signed lines featuring drawings of smartphones.)<br />
<br />
(The thicker "Ringer volume" line starts one unit below the thinner "Media volume" line. At around 12% of the width of the comic, a picture of buttons with arrow pointing to lower button labelled "TAP TAP TAP TAP" corresponds to ringer volume line lowering by four units, step by step. At around 25% of the width of the comic, a picture of buttons with arrow pointing to higher button labelled "TAP TAP TAP TAP" corresponds to ringer volume line rising by four units, step by step, returning to original value.)<br />
<br />
(At around 50% width of the comic and 60% width of the comic respectively, similar things to those described above happen, except the labels read "TAP TAP TAP" and ringer volume line shifts down and up by three units instead of four.)<br />
<br />
(Another such figure starts at 80% of width of the comic, again involving four "TAP"s and units, but the ringer volume line stops rising two units below original value. Instead, previously stable "media volume" line raises by two units step by step afterwards. This also corresponds to "media volume" line becoming thicker and "ringer volume" line becoming thinner. The pictures of smartphone, previously displaying a loading indicator, end with one showing what appears to be a video web page with a person in speaking to the camera. The text denoting person's words in the video indicates they are loud.)<br />
<br />
Person in the video: Hello, and welcome to...<br />
<br />
{{comic discussion}}<br />
<br />
[[Category:Line graphs]]<br />
[[Category:Smartphones]]</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=1884:_Ringer_Volume/Media_Volume&diff=1448661884: Ringer Volume/Media Volume2017-09-01T18:34:56Z<p>162.158.202.226: </p>
<hr />
<div>{{comic<br />
| number = 1884<br />
| date = September 1, 2017<br />
| title = Ringer Volume/Media Volume<br />
| image = ringer_volume_media_volume.png<br />
| titletext = Our new video ad campaign has our product's name shouted in the first 500 milliseconds, so we can reach the people in adjacent rooms while the viewer is still turning down the volume.<br />
}}<br />
<br />
==Explanation==<br />
{{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br />
<br />
The {{w|Smartphone|smartphones}}, as of the time of publication of the comic, tend to have multiple system-level sound volume settings, such as, for example, phone call alarm volume, timed alarm volume, phone communication volume, and media volume, the last covering video, music, games and such. For comparison, personal computers running under recent versions of Windows operating system and such tend to expose the user to a master sound volume control by default, which affects all the sounds emitted by system. Applications that emit sound (other than basic interface sounds, such as clicking) tend to implement a separate volume control themselves.<br />
<br />
In addition, smartphones tend to have dedicated hardware buttons for sound volume control that naturally map to rising and lowering sound volume. However they don't differentiate which of available volume controls user wants to adjust. Smartphone operating systems tend to resolve to adjust the volume level of currently emitted sound type, with some default in case of sound not playing, typically the phone call alarm (ringer). Adjusting arbitrary volume control is usually possible using system settings app controlled by touch screen, which can take more time than pressing dedicated buttons, and/or stop currently used program, depending on the smartphone in question.<br />
<br />
The comic demonstrates, using a time axis, a typical annoyance generated by this kind of setup. User wants to play a video clip but expects its sound volume, or sound volume or a preceding advertisement, to be louder than optimal, so they start to preemptively press button responsible for lowering sound volume. However, since video clip just started loading while user preemptively pressed the button, this leads to adjustment of phone alarm volume instead of media volume, which is not what was intended at all. User proceeds to raise the ringer volume and waits until the information box about ringer volume being adjusted disappears from screen, then tries again. This still doesn't work again, since video is still loading, and apparently needs to start emitting sound before possibility of adjusting that sound with volume buttons arises. This is exactly what eventually happens - the video starts uncomfortably loudly and user's delayed reaction while attempting to readjust ringer volume level leads, in fact, to ''raising'' the media volume. At this point, graph ends, though user is implied in the title text to proceed to reduce the video's volume within the incoming half of a second.<br />
<br />
Despite most applications implementing separate sound controls, Windows has also been able to adjust volume on per-activity basis since at least Windows XP. You can access this feature on the most recent (as of 2017) version of Windows 10 by right-clicking the speaker icon on the tray, and selecting the "Volume Mixer" option. This setup is roughly equivalent to opening system settings on a smartphone. Additionally, some versions of Windows made the system tray volume control only affect the currently focused program, sort of analogously to described smartphone behaviour; this feature has been however removed, presumably to reduce user confusion.<br />
<br />
The title text presents a method of exploiting the phenomenon presented in the main comic by putting important parts of an advertisement very early in the video clip in loud audio form. Since user may have problems with adjusting video sound volume before it starts playing, this will result in the important part of ad (here, product name) emitted very loudly, to the levels of narrator of title text expecting it to reach people in other rooms than one the smartphone is in.<br />
<br />
==Transcript==<br />
{{incomplete transcript|Do NOT delete this tag too soon.}}<br />
<br />
{{comic discussion}}<br />
<br />
[[Category:Line graphs]]<br />
[[Category:Smartphones]]</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=1884:_Ringer_Volume/Media_Volume&diff=1448601884: Ringer Volume/Media Volume2017-09-01T18:14:29Z<p>162.158.202.226: </p>
<hr />
<div>{{comic<br />
| number = 1884<br />
| date = September 1, 2017<br />
| title = Ringer Volume/Media Volume<br />
| image = ringer_volume_media_volume.png<br />
| titletext = Our new video ad campaign has our product's name shouted in the first 500 milliseconds, so we can reach the people in adjacent rooms while the viewer is still turning down the volume.<br />
}}<br />
<br />
==Explanation==<br />
{{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br />
<br />
The {{w|Smartphone|smartphones}}, as of the time of publication of the comic, tend to have multiple system-level sound volume settings, such as, for example, phone call alarm volume, timed alarm volume, phone communication volume, and media volume, the last covering video, music, games and such. For comparison, personal computers running under recent versions of Windows operating system and such tend to expose the user to a master sound volume control by default, which affects all the sounds emitted by system. Applications that emit sound (other than basic interface sounds, such as clicking) tend to implement a separate volume control themselves.<br />
<br />
In addition, smartphones tend to have dedicated hardware buttons for sound volume control, however these are usually limited to two buttons that naturally map to rising and lowering sound volume, however they don't naturally map to selection of which volume control user wants to adjust. Smartphone operating systems tend to resolve to adjust the volume level of currently emitted sound type, with some default in case of sound not playing, typically the phone call alarm (ringer). Adjusting arbitrary volume control is usually possible using system settings app controlled by touch screen, which can take more time than pressing dedicated buttons, and/or stop currently used program, depending on the smartphone in question.<br />
<br />
The comic demonstrates, using a time axis, a typical annoyance generated by this kind of setup. User wants to play a video clip but expects its sound volume, or sound volume or a preceding advertisement, to be louder than optimal, so they start to preemptively press button responsible for lowering sound volume. However, since video clip just started loading while user preemptively pressed the button, this leads to adjustment of phone alarm volume instead of media volume, which is not what was intended at all. User proceeds to raise the ringer volume and waits until the information box about ringer volume being adjusted disappears from screen, then tries again. This doesn't work again, since video is still loading, and apparently needs to start emitting sound before possibility of adjusting that sound with volume buttons arises, and this is exactly what happens after another ringer volume readjusting - the video starts uncomfortably loudly, upon which user finally manages to adjust media volume down.<br />
<br />
Despite most applications implementing separate sound controls, Windows has also been able to adjust volume on per-activity basis since at least Windows 95. You can access this feature on the most recent (as of 2017) version of Windows 10 by right-clicking the speaker icon on the tray, and selecting the "Volume Mixer" option. This setup is roughly equivalent to opening system settings on a smartphone. Additionally, some versions of Windows made the system tray volume control only affect the currently focused program, sort of analogously to described smartphone behaviour; this feature has been however removed, presumably to reduce user confusion.<br />
<br />
The title text presents a method of exploiting the phenomenon presented in the main comic by putting important parts of an advertisement very early in the video clip in loud audio form. Since user may have problems with adjusting video sound volume before it starts playing, this will result in the important part of ad (here, product name) emitted very loudly, to the levels of narrator of title text expecting it to reach other rooms than one the smartphone is in.<br />
<br />
==Transcript==<br />
{{incomplete transcript|Do NOT delete this tag too soon.}}<br />
<br />
{{comic discussion}}<br />
<br />
[[Category:Line graphs]]<br />
[[Category:Smartphones]]</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=1884:_Ringer_Volume/Media_Volume&diff=1448551884: Ringer Volume/Media Volume2017-09-01T17:12:06Z<p>162.158.202.226: </p>
<hr />
<div>{{comic<br />
| number = 1884<br />
| date = September 1, 2017<br />
| title = Ringer Volume/Media Volume<br />
| image = ringer_volume_media_volume.png<br />
| titletext = Our new video ad campaign has our product's name shouted in the first 500 milliseconds, so we can reach the people in adjacent rooms while the viewer is still turning down the volume.<br />
}}<br />
<br />
==Explanation==<br />
{{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br />
<br />
The {{w|Smartphone|smartphones}}, as of the time of publication of the comic, tend to have multiple system-level sound volume settings, such as, for example, phone call alarm volume, timed alarm volume, phone communication volume, and media volume, the last covering video, music, games and such. For comparison, personal computers running under recent versions of Windows operating system and such tend to expose the user to a master sound volume control which affects all the sounds emitted by system, and applications that tend to emit other sound are expected to implement a separate volume control themselves.<br />
<br />
In addition, smartphones tend to have dedicated hardware buttons for sound volume control, however these are usually limited to two buttons that naturally map to rising and lowering sound volume, however they don't naturally map to selection of which volume control user wants to adjust. Smartphone operating systems tend to resolve to adjust the volume level of currently emitted sound type, with some default in case of sound not playing, typically the phone call alarm (ringer). Adjusting arbitrary volume control is usually possible using system settings app controlled by touch screen, which can take more time than pressing dedicate buttons, and/or stop currently used program, depending on the smartphone in question.<br />
<br />
The comic demonstrates, using a time axis, a typical annoyance generated by this kind of setup. User wants to play a video clip but expects its sound volume, or sound volume or a preceding advertisement, to be louder than optimal, so they start to preemptively press button responsible for lowering sound volume. However, since video clip just started loading while user preemptively pressed the button, this leads to adjustment of phone alarm volume instead of media volume, which is not what was intended at all. User proceeds to raise the ringer volume and waits until the information box about ringer volume being adjusted disappears from screen, then tries again. This doesn't work again, since video is still loading, and apparently needs to start emitting sound before possibility of adjusting that sound with volume buttons arises, and this is exactly what happens after another ringer volume readjusting - the video starts uncomfortably loudly, upon which user finally manages to adjust media volume down.<br />
<br />
Interestingly, some earlier versions of Windows allow adjusting volume on per-program basis using a single on-screen control. This feature was eventually removed as it was deemed to confusing to users.<br />
<br />
The title text presents a method of exploiting the phenomenon presented in the main comic by putting important parts of an advertisement very early in the video clip in loud audio form. Since user may have problems with adjusting video sound volume before it starts playing, this will result in the important part of ad (here, product name) emitted very loudly, to the levels of narrator of title text expecting it to reach other rooms than one the smartphone is in.<br />
<br />
==Transcript==<br />
{{incomplete transcript|Do NOT delete this tag too soon.}}<br />
<br />
{{comic discussion}}<br />
<br />
[[Category:Line graphs]]<br />
[[Category:Smartphones]]</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=1878:_Earth_Orbital_Diagram&diff=1443101878: Earth Orbital Diagram2017-08-20T21:52:23Z<p>162.158.202.226: /* Labels and Their Astronomical Meanings */</p>
<hr />
<div>{{comic<br />
| number = 1878<br />
| date = August 18, 2017<br />
| title = Earth Orbital Diagram<br />
| image = earth_orbital_diagram.png<br />
| titletext = You shouldn't look directly at a partial eclipse because of the damage that can be caused by improperly aligning the solar-lunar orbital plane with the orbital bones around your eye.<br />
}}<br />
<br />
==Explanation==<br />
{{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br />
This comic is the third consecutive comic published in the week before the {{w|solar eclipse}} occurring on Monday, {{w|Solar eclipse of August 21, 2017|August 21, 2017}} which is a total solar eclipse and visible in totality within a band across the {{w|contiguous United States}} from west to east. The other comics are [[1876: Eclipse Searches]] and [[1877: Eclipse Science]].<br />
<br />
The comic claims that the reason that eclipses don't happen every month is simple to understand by looking at an orbital diagram. Ironically, the cartoon has so many parts and labels that it is far more difficult to understand than is implied. While the graph itself is based on {{w|Orbital elements|astronomical definitions}}, all the labels are nonsense in this context. In effect, the comic is a parody of a common joke in which a person asks a scientist a question, the scientist begins by saying "It's really quite simple", then proceeds to give a very lengthy and highly technical explanation that non-scientists would not be expected to understand.<br />
<br />
All of the labels in the diagram are complicated words or phrases. Some are related to orbital mechanics (e.g. "equinox" and "perihelion"), while others are wholly unrelated or even made up. Each label is nonsensical in its place in the diagram. Compare/contrast with the standard {{w|Kepler orbit|Kepler Orbit}} diagram.<br />
<br />
The title text references warnings to not look directly into the sun, but parodies those warnings by referring to 'orbit', the anatomical term for the eye socket.<br />
<br />
===Labels and Their Astronomical Meanings===<br />
<br />
;Arctangent<br />
*{{w|Arctangent}} is the inverse function of the tangent function of trigonometry. You can determine a non-right angle of a right triangle by taking the arctangent of the length of the opposite side divided by the length of the adjacent side.<br />
*The angle shown in the comic has no astronomical meaning.<br />
<br />
;Astral plane<br />
*The {{w|Astral plane}} is a plane of existence in various esoteric theories. It features prominently in Dungeons and Dragons cosmology, connecting the various other planes of existence.<br />
*The picture shows the {{w|Orbit_of_the_Moon|lunar orbital plane}}, the plane in which the Moon orbits the Earth, tilted about 5.1 degrees from the ecliptic.<br />
<br />
;Declension<br />
*{{w|Declension}} is the inflection of nouns in a language.<br />
*In astronomy, the {{w|Declination|declination}} is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system. It is measured north or south of the celestial equator, like the geographical latitude on Earth. But in the picture the label is at the angle for the axial tilt of the Earth.<br />
<br />
;Determinant of the date of Easter<br />
*In Western Christianity {{w|Easter}} always falls on the first Sunday after the first ecclesiastical full moon after the beginning of spring (equinox). The ecclesiastical full moon is determined by a calendar that approximates the actual time of the full moon, Thus the date of easter is defined by a combination of a solar and a moon calendar. The position of that angle isn't that bad but it should be not more than 30 degrees (slightly more than one month.)<br />
*In mathematics, the determinant is a function of numerical matrices. In this context, however, it apparently refers to something that directly determines the date of Easter.<br />
<br />
;Dimples of Venus<br />
*The {{w|Dimples of Venus}} are indentations sometimes visible on the human lower back.<br />
*In astronomy the {{w|Belt of Venus}} is a shadow cast by the Earth visible in its atmosphere.<br />
<br />
;Enceliopsis<br />
*{{w|Enceliopsis}} are small genus of flowering plants in the daisy family, appropriately known as "sunrays".<br />
*In astronomy this point has also no specific meaning. But {{w|Enceladus}} is a moon around {{w|Saturn}}.<br />
<br />
;Equinox / Solstice<br />
{{w|Equinox}} and {{w|Solstice}} have very different meanings:<br />
*An Equinox is one of two instants in the year when the sun is exactly over the equator; the length of day and night are very nearly equal that day at all locations on the planet, and (in the United States) it is the first day of Spring or Autumn, depending on the time of year.<br />
*A Solstice is one of two instants in the year when the sun's angle is maximally far from Earth's equator; when one occurs, the length of the day or night is shortest or longest (depending on whether one is in the northern or southern hemisphere), and (in the United States) it marks the first day of summer or winter.<br />
<br />
Both types occur because the Earth's rotation axis is tilted (at 23.4 degrees) from its orbital plane (ecliptic) about the Sun.<br />
<br />
Jokingly insisting that two different terms are American/British variants of the same word has been the topic of [[1677: Contrails]].<br />
<br />
;Hypothecate<br />
*{{w|Hypothecate}} is a legal verb that means something similar to "make a mortgage".<br />
*The {{w|hypotenuse}} is the longest side of a right-angled triangle. Here it is a length with no astronomical meaning, approximately equal to the diameter of the sun (half the angular size of the sun times twice the distance to it).<br />
<br />
;Obsequity<br />
*Obsequity means the state of being obsequious (showing an indecorous willingness to obey or serve, or "sucking up").<br />
*In astronomy the correct word is {{w|Obliquity}}, meaning an axial tilt.<br />
<br />
;Perihelix<br />
*This is a portmanteau of helix and perihelion.<br />
*The {{w|perihelion}} is the point in a elliptical solar orbit that is closest to the Sun.<br />
<br />
;Prolapse<br />
*A {{w|Prolapse}} is a medical condition in which an internal organ is slipped forward or down.<br />
*{{w|Retrograde and prograde motion}} are terms used to describe the apparent motion of celestial objects through the sky. <br />
<br />
;Sagittal plane<br />
*The {{w|Sagittal plane}} is an anatomical plane, dividing the body in left and right.<br />
*The correct label in the picture would be the {{w|Ecliptic plane}}. The plane the Earth orbits the Sun.<br />
*{{w|Sagittarius (constellation)|Sagittarius}} is one of the stellar constellations of the Zodiac. The center of the Milky Way lies in this constellation.<br />
<br />
;Solar plexus<br />
*The {{w|Solar plexus}} is a network of nerves located in the abdomen. It was the name of [[64: Solar Plexus]].<br />
*{{w|Solar}} is an adjective referring to the Sun, the star in our solar system.<br />
<br />
;Tropopause<br />
*The {{w|Tropopause}} is the boundary in our atmosphere between the troposphere and stratosphere, defined as the boundary where air ceases to cool with increasing elevation. It is 9-17 km above sea level, not the thousands of kilometers as depicted here.<br />
*The label appears to point at the orbit of the moon.<br />
<br />
;Angle between the Astral and the Sagittal Planes<br />
* The angle depicted is the inclination of the moon orbit. The planes are marked with the symbol for the Capricorn zodiac sign and an unknown symbol respectively; the angle is marked with the greek letter ''phi'' (ϕ), except with two vertical lines (as if it was a currency unit, similarly to the euro sign).<br />
<br />
;Errata<br />
* Errata are corrections in a published text (e.g. a newspaper article) issued after the publication.<br />
* The angle depicted as errata is half the angular size of the sun, which has to match the lunar angular size to cause a solar total eclipse.<br />
<br />
==Explanation for "Why isn't there a (solar) eclipse every month?"==<br />
<br />
If the plane of where the Earth orbits the Sun and where the Moon orbits the Earth were completely aligned, then there would be a solar eclipse at every new moon (once every {{w|Orbit_of_the_Moon#Lunar_periods| 29.5 days}}) and a lunar eclipse at every full moon (half a lunar period about 14.7 days after a New Moon). However, the plane in which the Moon orbits the Earth is tilted with an inclination of 5 degrees relative to that of the ecliptic plane (the plane defined by the Earth's orbit around the Sun). Eclipses are only possible during two eclipse seasons each year (half a year apart) where for a period of 31 to 37 days the Sun is nearly aligned with the two points in the tilted Earth-Moon plane where the Moon crosses the ecliptic plane. During an eclipse season at the time of a new moon there will be solar eclipses visible from certain locations and during full moons there will be lunar eclipses.<br />
<br />
[[Image:Eclipse_Diagram.jpg]]<br />
<br />
The real explanation of eclipses is evident from this xkcd comic, but is labeled with a fictional character similar to a Greek phi but with two vertical lines; the remaining labels also do not contribute to this explanation and exist only to distract or misinform the reader.<br />
<br />
==Transcript==<br />
{{incomplete transcript|Do NOT delete this tag too soon.}}<br />
:[An orbital map of the Earth is shown. The Sun is in the center, the Earth is at the right bottom, and the Moon is left below the Earth.]<br />
:'''Why isn't there an eclipse every month?'''<br />
:This is a common question! The answer is made clear by a quick look at the Earth's orbital diagram:<br />
<br />
:[Label Sun:]<br />
:Solar plexus<br />
<br />
:[Label on the Earth's plane:]<br />
:Sagittal plane<br />
<br />
:[Labels on Earth's orbit (beginning at the Earth counterclockwise):]<br />
:Perihelix, Declension, Obsequity, Hypothecate, Enceliopsis, Equinox (''Solstice'' in British English)<br />
<br />
:[Two angles in the plane are labeled as:]<br />
:Determinant of the date of Easter, Arctangent<br />
<br />
:[The plane of the Moon is pictured in a small angle to the Earth's plane and named Astral Plane. The angle is presented between two lines (Greek Nu or Gamma and a double Greek Chi) and identified by a "Game Of Thrones" 'O' (a character that looks similar to a Greek Phi but with two vertical lines).]<br />
:[The labels at the Moon's path are:]<br />
:Tropopause, Prolapse, Errata.<br />
<br />
:[An arrow points to the Earth at the zero meridian on the equator. The label reads:]<br />
:Dimples of Venus<br />
<br />
{{comic discussion}}<br />
<br />
[[Category:Astronomy]]</div>162.158.202.226https://www.explainxkcd.com/wiki/index.php?title=1878:_Earth_Orbital_Diagram&diff=1443091878: Earth Orbital Diagram2017-08-20T21:49:24Z<p>162.158.202.226: /* Labels and Their Astronomical Meanings */</p>
<hr />
<div>{{comic<br />
| number = 1878<br />
| date = August 18, 2017<br />
| title = Earth Orbital Diagram<br />
| image = earth_orbital_diagram.png<br />
| titletext = You shouldn't look directly at a partial eclipse because of the damage that can be caused by improperly aligning the solar-lunar orbital plane with the orbital bones around your eye.<br />
}}<br />
<br />
==Explanation==<br />
{{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br />
This comic is the third consecutive comic published in the week before the {{w|solar eclipse}} occurring on Monday, {{w|Solar eclipse of August 21, 2017|August 21, 2017}} which is a total solar eclipse and visible in totality within a band across the {{w|contiguous United States}} from west to east. The other comics are [[1876: Eclipse Searches]] and [[1877: Eclipse Science]].<br />
<br />
The comic claims that the reason that eclipses don't happen every month is simple to understand by looking at an orbital diagram. Ironically, the cartoon has so many parts and labels that it is far more difficult to understand than is implied. While the graph itself is based on {{w|Orbital elements|astronomical definitions}}, all the labels are nonsense in this context. In effect, the comic is a parody of a common joke in which a person asks a scientist a question, the scientist begins by saying "It's really quite simple", then proceeds to give a very lengthy and highly technical explanation that non-scientists would not be expected to understand.<br />
<br />
All of the labels in the diagram are complicated words or phrases. Some are related to orbital mechanics (e.g. "equinox" and "perihelion"), while others are wholly unrelated or even made up. Each label is nonsensical in its place in the diagram. Compare/contrast with the standard {{w|Kepler orbit|Kepler Orbit}} diagram.<br />
<br />
The title text references warnings to not look directly into the sun, but parodies those warnings by referring to 'orbit', the anatomical term for the eye socket.<br />
<br />
===Labels and Their Astronomical Meanings===<br />
<br />
;Arctangent<br />
*{{w|Arctangent}} is the inverse function of the tangent function of trigonometry. You can determine a non-right angle of a right triangle by taking the arctangent of the length of the opposite side divided by the length of the adjacent side.<br />
*The angle shown in the comic has no astronomical meaning.<br />
<br />
;Astral plane<br />
*The {{w|Astral plane}} is a plane of existence in various esoteric theories. It features prominently in Dungeons and Dragons cosmology, connecting the various other planes of existence.<br />
*The picture shows the {{w|Orbit_of_the_Moon|lunar orbital plane}}, the plane in which the Moon orbits the Earth, tilted about 5.1 degrees from the ecliptic.<br />
<br />
;Declension<br />
*{{w|Declension}} is the inflection of nouns in a language.<br />
*In astronomy, the {{w|Declination|declination}} is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system. It is measured north or south of the celestial equator, like the geographical latitude on Earth. But in the picture the label is at the angle for the axial tilt of the Earth.<br />
<br />
;Determinant of the date of Easter<br />
*In Western Christianity {{w|Easter}} always falls on the first Sunday after the first ecclesiastical full moon after the beginning of spring (equinox). The ecclesiastical full moon is determined by a calendar that approximates the actual time of the full moon, Thus the date of easter is defined by a combination of a solar and a moon calendar. The position of that angle isn't that bad but it should be not more than 30 degrees (slightly more than one month.)<br />
*In mathematics, the determinant is a function of numerical matrices. In this context, however, it apparently refers to something that directly determines the date of Easter.<br />
<br />
;Dimples of Venus<br />
*The {{w|Dimples of Venus}} are indentations sometimes visible on the human lower back.<br />
*In astronomy the {{w|Belt of Venus}} is a shadow cast by the Earth visible in its atmosphere.<br />
<br />
;Enceliopsis<br />
*{{w|Enceliopsis}} are small genus of flowering plants in the daisy family, appropriately known as "sunrays".<br />
*In astronomy this point has also no specific meaning. But {{w|Enceladus}} is a moon around {{w|Saturn}}.<br />
<br />
;Equinox / Solstice<br />
{{w|Equinox}} and {{w|Solstice}} have very different meanings:<br />
*An Equinox is one of two instants in the year when the sun is exactly over the equator; the length of day and night are very nearly equal that day at all locations on the planet, and (in the United States) it is the first day of Spring or Autumn, depending on the time of year.<br />
*A Solstice is one of two instants in the year when the sun's angle is maximally far from Earth's equator; when one occurs, the length of the day or night is shortest or longest (depending on whether one is in the northern or southern hemisphere), and (in the United States) it marks the first day of summer or winter.<br />
<br />
Both types occur because the Earth's rotation axis is tilted (at 23.4 degrees) from its orbital plane (ecliptic) about the Sun.<br />
<br />
Jokingly insisting that two different terms are American/British variants of the same word has been the topic of [[1677: Contrails]].<br />
<br />
;Hypothecate<br />
*{{w|Hypothecate}} is a legal verb that means something similar to "make a mortgage".<br />
*The {{w|hypotenuse}} is the longest side of a right-angled triangle. Here it is a length with no astronomical meaning, approximately equal to the diameter of the sun (half the angular size of the sun times twice the distance to it).<br />
<br />
;Obsequity<br />
*Obsequity means the state of being obsequious (showing an indecorous willingness to obey or serve, or "sucking up").<br />
*In astronomy the correct word is {{w|Obliquity}}, meaning an axial tilt.<br />
<br />
;Perihelix<br />
*This is a portmanteau of helix and perihelion.<br />
*The {{w|perihelion}} is the point in a elliptical solar orbit that is closest to the Sun.<br />
<br />
;Prolapse<br />
*A {{w|Prolapse}} is a medical condition in which an internal organ is slipped forward or down.<br />
*{{w|Retrograde and prograde motion}} are terms used to describe the apparent motion of celestial objects through the sky. <br />
<br />
;Sagittal plane<br />
*The {{w|Sagittal plane}} is an anatomical plane, dividing the body in left and right.<br />
*The correct label in the picture would be the {{w|Ecliptic plane}}. The plane the Earth orbits the Sun.<br />
*{{w|Sagittarius (constellation)|Sagittarius}} is one of the stellar constellations of the Zodiac. The center of the Milky Way lies in this constellation.<br />
<br />
;Solar plexus<br />
*The {{w|Solar plexus}} is a network of nerves located in the abdomen. It was the name of [[64: Solar Plexus]].<br />
*{{w|Solar}} is an adjective referring to the Sun, the star in our solar system.<br />
<br />
;Tropopause<br />
*The {{w|Tropopause}} is the boundary in our atmosphere between the troposphere and stratosphere, defined as the boundary where air ceases to cool with increasing elevation. It is 9-17 km above sea level, not the thousands of kilometers as depicted here.<br />
<br />
;Angle between the Astral and the Sagittal Planes<br />
* The angle depicted is the inclination of the moon orbit. The planes are marked with the symbol for the Capricorn zodiac sign and an unknown symbol respectively; the angle is marked with the greek letter ''phi'' (ϕ), except with two vertical lines (as if it was a currency unit, similarly to the euro sign).<br />
<br />
;Errata<br />
* Errata are corrections in a published text (e.g. a newspaper article) issued after the publication.<br />
* The angle depicted as errata is half the angular size of the sun, which has to match the lunar angular size to cause a solar total eclipse.<br />
<br />
==Explanation for "Why isn't there a (solar) eclipse every month?"==<br />
<br />
If the plane of where the Earth orbits the Sun and where the Moon orbits the Earth were completely aligned, then there would be a solar eclipse at every new moon (once every {{w|Orbit_of_the_Moon#Lunar_periods| 29.5 days}}) and a lunar eclipse at every full moon (half a lunar period about 14.7 days after a New Moon). However, the plane in which the Moon orbits the Earth is tilted with an inclination of 5 degrees relative to that of the ecliptic plane (the plane defined by the Earth's orbit around the Sun). Eclipses are only possible during two eclipse seasons each year (half a year apart) where for a period of 31 to 37 days the Sun is nearly aligned with the two points in the tilted Earth-Moon plane where the Moon crosses the ecliptic plane. During an eclipse season at the time of a new moon there will be solar eclipses visible from certain locations and during full moons there will be lunar eclipses.<br />
<br />
[[Image:Eclipse_Diagram.jpg]]<br />
<br />
The real explanation of eclipses is evident from this xkcd comic, but is labeled with a fictional character similar to a Greek phi but with two vertical lines; the remaining labels also do not contribute to this explanation and exist only to distract or misinform the reader.<br />
<br />
==Transcript==<br />
{{incomplete transcript|Do NOT delete this tag too soon.}}<br />
:[An orbital map of the Earth is shown. The Sun is in the center, the Earth is at the right bottom, and the Moon is left below the Earth.]<br />
:'''Why isn't there an eclipse every month?'''<br />
:This is a common question! The answer is made clear by a quick look at the Earth's orbital diagram:<br />
<br />
:[Label Sun:]<br />
:Solar plexus<br />
<br />
:[Label on the Earth's plane:]<br />
:Sagittal plane<br />
<br />
:[Labels on Earth's orbit (beginning at the Earth counterclockwise):]<br />
:Perihelix, Declension, Obsequity, Hypothecate, Enceliopsis, Equinox (''Solstice'' in British English)<br />
<br />
:[Two angles in the plane are labeled as:]<br />
:Determinant of the date of Easter, Arctangent<br />
<br />
:[The plane of the Moon is pictured in a small angle to the Earth's plane and named Astral Plane. The angle is presented between two lines (Greek Nu or Gamma and a double Greek Chi) and identified by a "Game Of Thrones" 'O' (a character that looks similar to a Greek Phi but with two vertical lines).]<br />
:[The labels at the Moon's path are:]<br />
:Tropopause, Prolapse, Errata.<br />
<br />
:[An arrow points to the Earth at the zero meridian on the equator. The label reads:]<br />
:Dimples of Venus<br />
<br />
{{comic discussion}}<br />
<br />
[[Category:Astronomy]]</div>162.158.202.226