Talk:Universe

GAR

Universe

The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.

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Article (edit | visual edit | history) · Article talk (edit | history) · Watch • Watch article reassessment page • Most recent review

Result: Kept per consensus. ~~ AirshipJungleman29 (talk) 02:01, 7 March 2023 (UTC)

GA from 2015 that have multiple problems. I posted this comments 20 days ago, but it seems that nobody is willing to update that article and thus GAR is required.

The article is not bad, but currently lacks citations is several sections. Chronology and the Big Bang is mostly unsourced, with cn and clarification needed tags. Physical properties uses really strange source ("Antimatter". Particle Physics and Astronomy Research Council", see citation 44). Age and expansion ends with a strange sentence This acceleration does not, however, imply that the Hubble parameter is currently increasing; see deceleration parameter for details. Spacetime has unsourced sentences. Support of life is just a few sentences with really strange sourcing: "Isaak, Mark, ed. (2005). "CI301: The Anthropic Principle". Index to Creationist Claims." (see citation 78). Halfs of Dark energy and Ordinary matter are unsourced. Same for Hadrons.

Historical conceptions are also problematic. Half is unsourced, and the sourced parts are often built on really old sources: see "Stcherbatsky, F. Th. (1930, 1962)" (citation 152), citation 13 lacks year and page, cit 150 lacks year. Astronomical concepts is either unsourced or sourced to "Aristotle; Forster, E. S.; Dobson, J. F. (1914)"; the article abruptly ends with The modern era of physical cosmology began in 1917, when Albert Einstein first applied his general theory of relativity to model the structure and dynamics of the universe. with nothing about modern era.

There is also a question on talk page about the audio version being outdated (13 June 2012 (!)) - maybe it should simply be removed? Artem.G (talk) 17:39, 6 February 2023 (UTC)

I think a public-outreach website from the Particle Physics and Astronomy Research Council is a decent source for a general statement like that, all things told. It would be nice to have a citation that isn't an archived copy of a web page, and we can swap it out, but I wouldn't stress over it. The Index to Creationist Claims is probably also OK for mainstream scientific responses to pseudoscientific nonsense, and thus for short summaries of mainstream positions on out-there speculation.

In "Ordinary matter", the stuff about four familiar phases plus BECs and such is standard, and a decent college textbook would be a reasonable source. I will try to dig up the Allday book which is cited in the "Hadrons" section; it might cover that whole paragraph already. XOR'easter (talk) 13:41, 14 February 2023 (UTC)

It occurs to me that we recently put Planet and Solar system through successful FA reviews, and the historical material in those could also be applicable here. It took a long time for the Universe to be recognized as a much bigger thing than the solar system, after all. XOR'easter (talk) 15:32, 14 February 2023 (UTC)

I removed the last remaining cn from the Chronology section after adding links to the flatness and horizon problems, which were being alluded to, but unclearly. These are quite complicated ideas and so best not to attempt to summarise in a sentence or two. PaddyLeahy (talk) 00:28, 20 February 2023 (UTC)

Well, it's in better shape now. I'll leave it for someone else to decide whether it is "Good". XOR'easter (talk) 19:46, 27 February 2023 (UTC)

• Keep looks good, and I trust XOR's knowledge more than my own ability to assess. ~~ AirshipJungleman29 (talk) 22:14, 2 March 2023 (UTC)

• Keep, thanks to XOR article looks better now! Artem.G (talk) 10:30, 4 March 2023 (UTC)

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.

The Universe...upper case

How can the Earth be a proper noun, and the Moon, and the Solar System, but not the "Universe"...?

This, of course, is a logical non sequitur.

It reminds me of a cheeky critique of a photograph in "The Mechanical Bride" by Marshall McLuhan, which depicted advanced high school students standing behind a field of placards labeled with (something like) "The 100 Greatest Concepts in History". Which McLuhan perused, and added this aptly terse observation:

"War, but not Peace?"

Ditto Space.

'Space' is an upper case noun for a *place*, like the Earth, the Moon, and the Solar System, regardless that its dimension is undelimited: 'space' is a lower case noun for a specific (but generic) amount of it. Like a "workspace", or the space between these two brackets [ ]. You don't get "Lost in space". You're "Lost in Space"...irrespective of whether that's a TV show title or not. It wasn't the 'space Race' the US and Soviet Union waged against eachother.

How do we get this right? 2601:196:180:DC0:ADBF:1D31:A5F4:9ADA (talk) 12:11, 13 January 2025 (UTC)

It's been discussed before here, if you think it's wrong you can familiarize yourself with Wikipedia's policies and make a case, but you'll need to find some pretty serious sources that it's misspelled here, which may be an issue. Warrenᚋᚐᚊᚔ 12:55, 13 January 2025 (UTC)

Agree. It's been discussed ad infinitum on these pages. There is no consensus in astronomical literature whether to capitalize "universe" or not. However, I think it's clear "space" is a common noun. --Chetvorno^TALK 15:49, 13 January 2025 (UTC)

Temperature?

The highlight box indicates that the average temperature of the univers is 2.7 K. This surprised me. I know that the solar wind at 1AU has a temperature of millions of degrees, though the density is low so the heat content is low. Isambard Kingdom (talk) 01:04, 4 May 2025 (UTC)

Are you surprised because it's high or because it's low? Remsense ‥ 论 01:06, 4 May 2025 (UTC)

As the box notes, it's the temperature of the cosmic microwave background (and by extension the photons). The average temperature of the matter in the universe is much higher. Aseyhe (talk) 05:20, 4 May 2025 (UTC)