explain xkcd - User contributions [en]

Talk:2921: Eclipse Path Maps

2024-04-18T06:11:50Z

Lordpipe:

Can anyone think of some particularly pathological solar eclipse examples? [[User:Lordpipe|Lordpipe]] ([[User talk:Lordpipe|talk]]) 06:11, 18 April 2024 (UTC)

Talk:2863: Space Typography

2023-12-06T10:35:50Z

Lordpipe:

Are the dot's actually roughly in line with the distances?

[[Special:Contributions/172.71.135.78|172.71.135.78]] 21:31, 4 December 2023 (UTC)

Yes they are. I eyeballed with a screenruler and calculated

* 0.40 AU for Mercury (Should be 0.37)
* 0.72 AU for Venus (0.72)
* 1 AU for earth (reference)
* 1.54 AU for Mars (1.52)
* 5.24 AU for Jupiter (4.98)

[[Special:Contributions/162.158.202.94|162.158.202.94]] 21:48, 4 December 2023 (UTC)

But what size font?[[User:Danger Kitty|Danger Kitty]] ([[User talk:Danger Kitty|talk]])
:129 trillion pt, give or take. [[Special:Contributions/141.101.105.109|141.101.105.109]] 23:02, 4 December 2023 (UTC)
:: Thanks for the decimal-point check. This is my worksheet: [https://i.postimg.cc/tRsmk3c6/Oprimistic-AU.gif Image] (open in new tab) [[User:PRR|PRR]] ([[User talk:PRR|talk]]) 02:13, 5 December 2023 (UTC)

The number of "e"s between h and r required to make Saturn line up is about 59 (tested using 27.2 pt font) [[User:Digin|Digin]] ([[User talk:Digin|talk]]) 22:17, 4 December 2023 (UTC)
: There are currently three different figures in the explanation for how many "e"s are needed. One says the title text is correct as written, brackets and ellipsis and all. One says 59. One says 85. They can't all be right. [[User:LtPowers|LtPowers]] ([[User talk:LtPowers|talk]]) 13:22, 5 December 2023 (UTC)
:: "They can't all be right." Well, they can, if they don't correspond to the same thing. Are we using the font size from the comic, or from the hover text? [[User:Rexon Mobile|Rexon Mobile]] ([[User talk:Rexon Mobile|talk]]) 15:39, 5 December 2023 (UTC)

:: I think the [...] has to be condensing what should be a longer title text. If is was "correct as written", that's an extra 3 dots that don't correspond to planets or anything in that region of space. So unless someone can find some objects in that part of space, I think "correct as written" should be vetoed. Also, can't use periods, colons, or semicolons -- would need to separate the main sentence from the title text addition using perhaps a dash or a comma (as long as a comma isn't as comet). [[User:N0lqu|-boB]] ([[User talk:N0lqu|talk]]) 17:22, 5 December 2023 (UTC)
::: The sentence is using only the dots that are part of 'i's. Although the comic's text refers to "dots" without specifying that restriction, we don't have to assume that 'j's and punctuation must also correspond to solar system bodies. [[User:BunsenH|BunsenH]] ([[User talk:BunsenH|talk]]) 20:06, 5 December 2023 (UTC)

I’m curious whether randall brute forced this, trained a neural network, or did it by hand. [[Special:Contributions/172.70.175.179|172.70.175.179]] 22:31, 4 December 2023 (UTC)
:He would probably answer: [[2173: Trained a Neural Net]] [[Special:Contributions/172.70.42.217|172.70.42.217]] 22:45, 4 December 2023 (UTC)

Trying to prep an image of a comparison between actual orbits and the comic, but it's taking longer than i'd like [[User:SomeoneIGuess|someone, i guess]]([[User talk:SomeoneIGuess|talk i guess]]|[[Special:Contributions/SomeoneIGuess|le edit list]]) 23:20, 4 December 2023 (UTC)

I assume brackets around (i) are for the Saturn's rings? [[Special:Contributions/162.158.102.71|162.158.102.71]] 23:26, 4 December 2023 (UTC)
:Ooh, good call. Put that in. [[User:LtPowers|LtPowers]] ([[User talk:LtPowers|talk]]) 13:22, 5 December 2023 (UTC)
:I assumed it was just a way to emphasize the i. In the comic, they are bolded, but that is not possible in title text. - [[Special:Contributions/172.68.27.133|172.68.27.133]] 22:28, 5 December 2023 (UTC)

The long, rambling diatribe about literature seemed odd at first, but I think Charlotte Brontë would be proud she was able to represent Pluto and Charon. [[Special:Contributions/172.69.247.56|172.69.247.56]] 04:07, 5 December 2023 (UTC)
:I don't understand. What's this about Charlotte Brontë? I don't see any reference to her in this comic.[[Special:Contributions/162.158.155.112|162.158.155.112]] 20:17, 5 December 2023 (UTC)
:: It's a joke about umlauts. [[Special:Contributions/172.69.247.48|172.69.247.48]] 06:37, 6 December 2023 (UTC)

For what it's worth, the asteroid belt spans the area covered by the word "measure" [[Special:Contributions/172.71.222.152|172.71.222.152]] 14:10, 5 December 2023 (UTC)
:It would be nice if the word gaps were aligned that way, but there is no obvious alignment with either the edges of the asteroid belt, or the location of the Kirkwood gaps. The asteroid belt would stretch from the middle of the M in "measure" to the P in "space", with the most prominent Kirkwood gaps corresponding roughly to the letters A, R and E. [[User:Rexon Mobile|Rexon Mobile]] ([[User talk:Rexon Mobile|talk]]) 15:33, 5 December 2023 (UTC)
:If he really wanted to represent the asteroids, I think he might have found a way to include a word like "riiii[...]iiight" so there would be lots of dots. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 15:51, 5 December 2023 (UTC)

I added the table with the count of 'e's and adjusted the wording where it said 85 'e's from the Sun to say an extra 13 'e's in the word "here". I worked this out using an image from Wikipedia (https://en.wikipedia.org/wiki/Solar_System#/media/File:Solar_System_distance_to_scale.svg) in PowerPoint but don't have upload privileges to post. Would be nice if someone could do that. [[User:Denver87|Denver87]] ([[User talk:Denver87|talk]]) 15:30, 5 December 2023 (UTC)

Amazingly (assuming my math was right so please someone check) the sun to scale would be very close to the size of the actual dots used to represents the planets. (Planets wouldn't be visible.)

I don't see why the mnemonic for the order of the planets would be relevant to this comic. Should it be removed? [[User:Rexon Mobile|Rexon Mobile]] ([[User talk:Rexon Mobile|talk]]) 17:40, 5 December 2023 (UTC)
: Absolutely. No relevance to the comic. removed [[User:SomeoneIGuess|someone, i guess]]([[User talk:SomeoneIGuess|talk i guess]]|[[Special:Contributions/SomeoneIGuess|le edit list]]) 18:18, 5 December 2023 (UTC)
:: I put it in because it was another mnemonic about the solar system. [*shrug*] [[User:BunsenH|BunsenH]] ([[User talk:BunsenH|talk]]) 19:59, 5 December 2023 (UTC)
: what?! it should at least be mentioned. this comic wouldn't exist in a world without well-known solar system mnemonics :D
: [[User:Lordpipe|Lordpipe]] ([[User talk:Lordpipe|talk]]) 10:35, 6 December 2023 (UTC)

== what if? news! ==

I can't find it anywhere here, but there is now an official what if youtube channel with (currently) two videos uploaded! Also, I think the most recent one *isn't* a duplicate of one already covered in other what if? media! (yeah i know this isnt related to the comic but this is where people will see it)[[Special:Contributions/162.158.175.61|162.158.175.61]] 23:38, 5 December 2023 (UTC)Bumpf
:No, it's been covered somewhere in one of Randall's books. But for anyone who's wondering, here's the link. https://www.youtube.com/@xkcd_whatif
:: If it's been covered already, i find it strange that its first upload was November 30, 2023... [[User:SomeoneIGuess|someone, i guess]]([[User talk:SomeoneIGuess|talk i guess]]|[[Special:Contributions/SomeoneIGuess|le edit list]]) 00:19, 6 December 2023 (UTC)
::: A quick reading of the video's comment indicate that it is taken from the first book, so "the most recent one *isn't* a duplicate of one already covered in other what if? media!" is incorrect, no matter when the free access was added on Youtube. [[Special:Contributions/162.158.233.107|162.158.233.107]] 08:35, 6 December 2023 (UTC)

2863: Space Typography

2023-12-05T04:28:35Z

Lordpipe: Exact pixel distances, as close to the center of the dots in the HiDPI version of the comic

{{comic
| number = 2863
| date = December 4, 2023
| title = Space Typography
| image = space_typography_2x.png
| imagesize = 740x239px
| noexpand = true
| titletext = And over heeee[...]eeeere (i)s Saturn.
}}

==Explanation==
{{incomplete|Created by an OPTIMISTIC ALIEN OVER THEEEE[...]EEEERE (i)N... NEPTUNE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
Randall has created a sentence with the property that, when printed in {{w|Times New Roman}} font, the distances of the "i" letters from the first letter are proportional to the radii of the orbits of the innermost 5 planets in the {{w|Solar System}}. These are the only letters in the sentence that have a dot over the letter (there are no "j"s in the sentence). He suggests that if you get lost traveling among these planets, you can use the dots as a map.

This won't actually be a very useful map. When traveling between planets, it's not enough to know where the planet's orbit is, you also need to know where it is along the orbit.

The sentence is self-referential, since it talks about using typography to measure distances in space, and this makes it a useful mnemonic. The "optimistic" in the sentence could indicate that the aliens in question are highly optimistic that this kind of "map" would be useful for navigating a star system where planets orbit in ellipses, rather than being in static positions along a line (as is so often depicted in line-ups of the Solar System's planets).

The title text appends the sentence with a section for identifying Saturn. It contains an ellipsis in brackets, which normally signifies that an indeterminate number of 'e's has been omitted from the sentence, seemingly to represent Saturn's large orbital radius as the next 'i' in “is”. The trick is that actually appending the sentence literally, brackets and all, after the original sentence (so that we get "Optimistic aliens measure space typographically. And over heeee[...]eeeere (i)s Saturn.") actually puts the dot on the last 'i' at Saturn's orbit. Similar sentences with varying numbers of 'e's could be used to continue out to any planet or other body which does not contain the letter 'i' – which is all of the remaining planets and minor planets, with the exception of Eris. However, the strings of 'e's would get longer and longer, to the point that it might be necessary to write down how many of them are to be used – about 59 'e's for Saturn, starting from the Sun – which might as well just be replaced with a table of orbital ephemerides.

==Accuracy==
[[File:2863OrbitComparison.png|thumb|Comparison between orbits of Mercury, Venus, Earth, Mars, and Jupiter to the dots in the comic]]
Measuring the distances based on the provided image results in these approximate distances:

{| class="wikitable" style="margin:auto"
|-
! Planet !! Pixel offset !! Relative Distance in Comic !! Actual Distance in AU<ref>https://www.jpl.nasa.gov/edu/pdfs/scaless_reference.pdf</ref>
|-
| Mercury || 93 || 0.3907 || 0.39
|-
| Venus || 169 || 0.7101 || 0.72
|-
| Earth || 238 || 1 || 1
|-
| Mars || 362 || 1.5210 || 1.52
|-
| Jupiter || 1229 || 5.1639 || 5.2
|}

The picture also contains a standard-representation of Times New Roman, with no changes to kerning or tracking.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[A grayed-out sentence in the Times New Roman font reads "Optimistic aliens measure space typographically". The "O" in "Optimistic" is dark black and indicated as representing the Sun (not to scale). The dots of the letters "i" in the sentence are similarly dark black. The dot in the first "i" in "Optimistic" is indicated as representing Mercury; the dot in the second "i" represents Venus; the dot in the third "i" represents Earth. The dot in the "i" in "aliens" is indicated as representing Mars. The dot in the "i" in "typographically" is indicated as representing Jupiter. A measurement bar indicates that the distance between the "O" and the third "i" in "Optimistic" is equivalent to 1 AU (astronomical unit).]

:[Caption below the panel:]
:Space tip: if you're ever lost in the inner Solar System, you can just type out the phrase "Optimistic aliens measure space typographically" in Times New Roman and use the dots as a map.

{{comic discussion}}

[[Category:Space]]
[[Category:Tips]]

Talk:2623: Goofs

2022-05-23T17:32:10Z

Lordpipe:

I'm getting a 404 error when I try to go to the comic by number. But it shows up on the main xkcd.com home page. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 16:39, 23 May 2022 (UTC)
: https://xkcd.com/2623/ works for me. [[User:Sollyucko|Sollyucko]] ([[User talk:Sollyucko|talk]]) 16:52, 23 May 2022 (UTC)

Any New Yorkers here to confirm if there's a harpoon store a few blocks from Union Square? If not, that needs to be listed here as a "goof"... I really do love that line suggesting "harpoon stores" are common enough but the nearest one doesn't have an outdoor display. [[User:Ids1024|Ids1024]] ([[User talk:Ids1024|talk]]) 17:18, 23 May 2022 (UTC)

There may not be a store explicitly called a "harpoon store", but there is at least one diving equipment store that has harpoons. [[Special:Contributions/162.158.78.65|162.158.78.65]] 17:27, 23 May 2022 (UTC)

I'm glad Randall Munroe also hates CinemaSins. [[User:Lordpipe|Lordpipe]] ([[User talk:Lordpipe|talk]]) 17:32, 23 May 2022 (UTC)