explain xkcd - User contributions [en]

Talk:2922: Pub Trivia

2024-04-19T14:33:14Z

RedGolpe:

I expect that the BTS question is a reference to the traditional Korean system of counting a person's age in units of Sal which started at 1 and incremented on the first day of the year. Since this system was abandoned on official documents in 2023, but is still in use in some contexts, the question of whether every member of BTS had a "birthday" on the first day of the year is ambiguous. [[User:Philhower|Philhower]] ([[User talk:Philhower|talk]]) 14:13, 19 April 2024 (UTC)

question 5, planets exist outside the solar system, adding to the ambiguity. [[User:Philhower|Philhower]] ([[User talk:Philhower|talk]]) 14:15, 19 April 2024 (UTC)

As for question 9, please see the note about the history of Austrailia's capitals at: [[https://en.wikipedia.org/wiki/List_of_former_national_capitals#Oceania]]. and the page regarding countries with multiple capitals [[https://en.wikipedia.org/wiki/List_of_countries_with_multiple_capitals]] [[User:Philhower|Philhower]] ([[User talk:Philhower|talk]]) 14:24, 19 April 2024 (UTC)

About the alt text, London is certainly in Europe. The question itself is malformed because "Europe (or 'the EU')" is not self-consistent: there is a lot of European countries that are not part of the EU. [[User:RedGolpe|RedGolpe]] ([[User talk:RedGolpe|talk]]) 14:32, 19 April 2024 (UTC)

Talk:2922: Pub Trivia

2024-04-19T14:32:54Z

RedGolpe:

I expect that the BTS question is a reference to the traditional Korean system of counting a person's age in units of Sal which started at 1 and incremented on the first day of the year. Since this system was abandoned on official documents in 2023, but is still in use in some contexts, the question of whether every member of BTS had a "birthday" on the first day of the year is ambiguous. [[User:Philhower|Philhower]] ([[User talk:Philhower|talk]]) 14:13, 19 April 2024 (UTC)

question 5, planets exist outside the solar system, adding to the ambiguity. [[User:Philhower|Philhower]] ([[User talk:Philhower|talk]]) 14:15, 19 April 2024 (UTC)

As for question 9, please see the note about the history of Austrailia's capitals at: [[https://en.wikipedia.org/wiki/List_of_former_national_capitals#Oceania]]. and the page regarding countries with multiple capitals [[https://en.wikipedia.org/wiki/List_of_countries_with_multiple_capitals]] [[User:Philhower|Philhower]] ([[User talk:Philhower|talk]]) 14:24, 19 April 2024 (UTC)

About the alt text, London is certainly in Europe. The question itself is malformed because "Europe (or 'the EU')" is not self-consistent: there is a lot of European countries that are not part of the EU.[[User:RedGolpe|RedGolpe]] ([[User talk:RedGolpe|talk]]) 14:32, 19 April 2024 (UTC)

Talk:2922: Pub Trivia

2024-04-19T14:32:34Z

RedGolpe:

2764: Cosmological Nostalgia Content

2023-04-18T13:22:19Z

RedGolpe: /* Explanation */ typo

{{comic
| number = 2764
| date = April 17, 2023
| title = Cosmological Nostalgia Content
| image = cosmological_nostalgia_content_2x.png
| imagesize = 316x386px
| noexpand = true
| titletext = Later renouncing clickbait, Einstein called his inclusion of cosmological content in general relativity the biggest blunder of his career.
}}

==Explanation==
{{incomplete|1=Created by a z=90s KID - Needs more explanation of what the click bait in the title text refers to in the context of the Einstein blunder and why that belongs in this nostalgia comic. Do NOT delete this tag too soon.}}

Like many xkcd's, this comic is a figurative {{w|Portmanteau|multimanteau}}, in this case a combination of "{{w|cosmological constant}}" (an astrophysics term to quantify the rate of expansion of the universe) and "[https://movementstrategy.com/editorial/nostalgia-social-media/ nostalgia content]" (clickbait marketing aimed at a specific age group referencing pop culture from their youth). The [https://tvtropes.org canonical examples] of nostalgia content are "[https://knowyourmeme.com/memes/only-90s-kids--2 Only 90s Kids Remember...]" and "[https://knowyourmeme.com/memes/feel-old-yet Feel Old yet?]".

In cosmology, z is the symbol for {{w|Redshift|redshift}}, which is the phenomenon where photons travelling from an object that is moving away from the observer exhibits an increase in wavelength, resulting in its colour shifting towards the red end of the spectrum. Due to the accelerating expansion of the universe, objects that are further away from us are moving away from us at a faster velocity, resulting in higher redshift. As light has finite velocity, it takes a longer time for light from faraway objects to arrive at the observer.[https://en.wikipedia.org/wiki/Speed_of_light#Spaceflight_and_astronomy] So the light observed at the present must have been emitted by the faraway object further back in time. Megan is stating that only people that appear to the observer with high redshift (z=10) will have existed sufficiently further back in the past to remember when the first stars were still forming. Megan also has a red tint (she is drawn in the colour [https://www.color-hex.com/color/462424 #462424], a very dark red; here is a comparison of #462424 and black: <span style="background-color: #462424">&emsp;</span> <span style="background-color: black">&emsp;</span>), indicating that she is one such z=10 kid. This would mean that she was born around 500 million years after the universe was formed, or almost 13 billion years ago. However, the James Webb Space Telescope famously discovered fully formed, large, bright galaxies around z=10 (of which the only explanations forthcoming so far are {{w|primordial black hole}}s[https://iopscience.iop.org/article/10.3847/2041-8213/ac927f/meta][https://arxiv.org/abs/2303.09391] or {{w|axion}} miniclusters[https://journals.aps.org/prd/abstract/10.1103/PhysRevD.107.043502]) so Megan's nostalgia may be somewhat confabulatory.

White Hat, meanwhile, is referencing the fact that the universe has {{w|Scale factor (cosmology)|three eras}}: radiation dominated, matter dominated, and dark energy dominated. As the universe expands, the density of radiation and matter decreases due to their dilution, causing the universe, which first started off being dominated by radiation, to then become dominated by matter, then by dark energy (which does not dilute as the universe expands). Dark energy dominated era, which is when "dark energy started accelerating the universe's expansion" started around 5 billion years ago while {{w|Evolution of bacteria|bacteria evolved around 3 billion years ago}}, meaning that they evolved closer to dark energy domination than to today.

The title and title text play with the similarity in sound between 'content' and 'constant', segueing between web(page) content and cosmological constant.

The title text refers to Einstein's inclusion of the {{w|Cosmological constant|cosmological constant}} to his theory of general relativity in order to attain a static model of the universe, which he later removed, reportedly referring to it as his "biggest blunder". Cosmological constant has, today, been generally accepted as a part of the current cosmological model, relating to the concept of dark energy.

==Transcript==
:[Megan (with a red tint) holds both her arms out and up while she is talking to Cueball to the left of her. To the right of Megan White Hat is holding both arms out and down while he is talking to Ponytail to the right of him.]
:Megan: Only Z=10 kids remember watching the cool dark gas that suffused the universe being eaten away by expanding bubbles of plasma around the first stars!
:White Hat: Want to feel old? Bacteria evolved closer to when dark energy started accelerating the universe's expansion than to today!

:[Caption below the panel]:
:Cosmological Nostalgia Content

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring real people]] 
[[Category:Comics to make one feel old]]
[[Category:Comics with color]] 
[[Category:Astronomy]]
[[Category:Biology]] 
[[Category:Clickbait]]

2668: Artemis Quote

2022-09-06T11:06:43Z

RedGolpe: /* Explanation */ wording

{{comic
| number = 2668
| date = September 5, 2022
| title = Artemis Quote
| image = artemis_quote.png
| titletext = Another option: "It is an honor to be the first human to set foot on the moon."
}}

==Explanation==
{{incomplete|created by a COLLABORATIVE EFFORT. Do NOT delete this tag too soon.}}

The {{w|Artemis program}} is a series of planned space missions that will land people on the Moon and begin to set up infrastructure for a permanent crewed presence. People first landed on the Moon in 1969 as part of the {{w|Apollo program}}. They have not been back since 1972.

When {{w|Neil Armstrong}} became the first person to walk on the Moon, he famously said, "That's one small step for man; one giant leap for mankind." However, he was intending to say, "That's one small step for '''''a''''' man; one giant leap for mankind [emphasis added]." [https://upload.wikimedia.org/wikipedia/commons/4/48/Frase_de_Neil_Armstrong.ogg The audio recording] omits the word "a", making the sentence confusing, as "man" and "mankind" have the same meaning when referring to all people. That it was apparently elided by Armstrong in the excitement, changing the meaning of the historical phrase, is controversial and thus humorous. Subsequently, Armstrong and others have blamed insufficiently tuned {{w|voice activity detection}} hardware circuitry intended to save power in radio voice transmission, but NASA engineers, third-party historians and their hired experts have never been able to corroborate that explanation.[https://www.hq.nasa.gov/office/pao/History/alsj/a11/a11.step.html][http://itre.cis.upenn.edu/~myl/languagelog/archives/003645.html] Armstrong later said he hoped, "history would grant me leeway for dropping the syllable and understand that it was certainly intended, even if it was not said," and, on p.126 of the June 1982 edition of ''Omni,'' "the 'a' is implied, so I'm happy if they just put it in parentheses."

[[Randall]] suggests that the first Artemis astronaut to set foot on the Moon has a duty to utter an even more confusing quote, saying the sentence, "This is one of my favorite historical quotes — the first words spoken by an Artemis astronaut on the moon," aloud as they step onto the Moon. That would be confusingly self-referential, as if they were alluding to something from the past. This is very unlikely, and funny merely as a recommendation. If it actually happened, it might be both hilarious and scandalous.

The title text suggests an alternate phrase by which the Artemis astronaut could say being the first (rather than 13th) human on the Moon is a great honor. People hearing this quote in the future could assume that Artemis was the first crewed mission to the Moon. It could feed into contemporary conspiracy theories that the Apollo landings were faked, furthering the confusion. Alternatively it could also imply all previous astronauts who set foot on the moon weren't human, or simply state a truth which has no connection with the Artemis mission.

=== Esoterica ===
* The {{w|schwa}} indefinite article "a" is optional in certain contexts of most dialects of American English.[https://linguapress.com/grammar/article-in-english.htm]
* While the comic's lunar lander has similarities to the {{w|Starship HLS|current plans}} for the Artemis lander,[https://www.nasa.gov/press-release/as-artemis-moves-forward-nasa-picks-spacex-to-land-next-americans-on-moon] it's a generic drawing, perhaps in homage to classic space science fiction, with the exit portal at an unlikely position near the base of the {{w|SpaceX Starship}} lander.[https://www.teslarati.com/spacex-starship-moon-elevator-nasa-prototype/]
* This comic coincides with the canceled launch of {{w|Artemis 1}}, an uncrewed test mission which will serve as the start of the Artemis program. The mission was intended to launch on 29 August 2022, and later on 3 September 2022, but was repeatedly postponed due to a series of technical problems and will now take place no earlier than late September 2022.
* In [[893: 65 Years]], Randall made a graph showing the number of living people who had been on the moon an estimated the day when zero would be alive. (Very depressing). At that time 9 of the 12 where still alive. Today at the time of this comics release is seems only four are still among the living. But with the Artemis project, it may not reach zero. 

==Transcript==
:[A vertical rocket is standing on four deployed legs on the surface of the Moon. The surface is depicted with characteristic craters and rocks with a slightly curved horizon. The rocket is standing in the left part of the panel. A short ladder leads down from a hatch in the lower part of the rocket body. An astronaut has stepped down from a ladder onto the Moon's surface, and is speaking:]

:Astronaut: This is one of my favorite historical quotes — the first words spoken by an Artemis astronaut on the Moon.

:[Caption beneath the panel:]
:Neil Armstrong's "man"/"a man" quote created a lot of historical confusion, and I think it's our duty to expand on that legacy with Artemis.

{{comic discussion}}

2668: Artemis Quote

2022-09-06T11:05:34Z

RedGolpe: added another possible explanation

{{comic
| number = 2668
| date = September 5, 2022
| title = Artemis Quote
| image = artemis_quote.png
| titletext = Another option: "It is an honor to be the first human to set foot on the moon."
}}

==Explanation==
{{incomplete|created by a COLLABORATIVE EFFORT. Do NOT delete this tag too soon.}}

The {{w|Artemis program}} is a series of planned space missions that will land people on the Moon and begin to set up infrastructure for a permanent crewed presence. People first landed on the Moon in 1969 as part of the {{w|Apollo program}}. They have not been back since 1972.

When {{w|Neil Armstrong}} became the first person to walk on the Moon, he famously said, "That's one small step for man; one giant leap for mankind." However, he was intending to say, "That's one small step for '''''a''''' man; one giant leap for mankind [emphasis added]." [https://upload.wikimedia.org/wikipedia/commons/4/48/Frase_de_Neil_Armstrong.ogg The audio recording] omits the word "a", making the sentence confusing, as "man" and "mankind" have the same meaning when referring to all people. That it was apparently elided by Armstrong in the excitement, changing the meaning of the historical phrase, is controversial and thus humorous. Subsequently, Armstrong and others have blamed insufficiently tuned {{w|voice activity detection}} hardware circuitry intended to save power in radio voice transmission, but NASA engineers, third-party historians and their hired experts have never been able to corroborate that explanation.[https://www.hq.nasa.gov/office/pao/History/alsj/a11/a11.step.html][http://itre.cis.upenn.edu/~myl/languagelog/archives/003645.html] Armstrong later said he hoped, "history would grant me leeway for dropping the syllable and understand that it was certainly intended, even if it was not said," and, on p.126 of the June 1982 edition of ''Omni,'' "the 'a' is implied, so I'm happy if they just put it in parentheses."

[[Randall]] suggests that the first Artemis astronaut to set foot on the Moon has a duty to utter an even more confusing quote, saying the sentence, "This is one of my favorite historical quotes — the first words spoken by an Artemis astronaut on the moon," aloud as they step onto the Moon. That would be confusingly self-referential, as if they were alluding to something from the past. This is very unlikely, and funny merely as a recommendation. If it actually happened, it might be both hilarious and scandalous.

The title text suggests an alternate phrase by which the Artemis astronaut could say being the first (rather than 13th) human on the Moon is a great honor. People hearing this quote in the future could assume that Artemis was the first crewed mission to the Moon. It could feed into contemporary conspiracy theories that the Apollo landings were faked, furthering the confusion. Alternatively it could also imply all previous astronauts who set foot on the moon weren't human, or simply state a simple truth which has no connection with the Artemis mission.

=== Esoterica ===
* The {{w|schwa}} indefinite article "a" is optional in certain contexts of most dialects of American English.[https://linguapress.com/grammar/article-in-english.htm]
* While the comic's lunar lander has similarities to the {{w|Starship HLS|current plans}} for the Artemis lander,[https://www.nasa.gov/press-release/as-artemis-moves-forward-nasa-picks-spacex-to-land-next-americans-on-moon] it's a generic drawing, perhaps in homage to classic space science fiction, with the exit portal at an unlikely position near the base of the {{w|SpaceX Starship}} lander.[https://www.teslarati.com/spacex-starship-moon-elevator-nasa-prototype/]
* This comic coincides with the canceled launch of {{w|Artemis 1}}, an uncrewed test mission which will serve as the start of the Artemis program. The mission was intended to launch on 29 August 2022, and later on 3 September 2022, but was repeatedly postponed due to a series of technical problems and will now take place no earlier than late September 2022.
* In [[893: 65 Years]], Randall made a graph showing the number of living people who had been on the moon an estimated the day when zero would be alive. (Very depressing). At that time 9 of the 12 where still alive. Today at the time of this comics release is seems only four are still among the living. But with the Artemis project, it may not reach zero. 

==Transcript==
:[A vertical rocket is standing on four deployed legs on the surface of the Moon. The surface is depicted with characteristic craters and rocks with a slightly curved horizon. The rocket is standing in the left part of the panel. A short ladder leads down from a hatch in the lower part of the rocket body. An astronaut has stepped down from a ladder onto the Moon's surface, and is speaking:]

:Astronaut: This is one of my favorite historical quotes — the first words spoken by an Artemis astronaut on the Moon.

:[Caption beneath the panel:]
:Neil Armstrong's "man"/"a man" quote created a lot of historical confusion, and I think it's our duty to expand on that legacy with Artemis.

{{comic discussion}}