Wikipedia talk:WikiProject Astronomy/Archive 38

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Archive 38

Regarding lists of solar eclipses

Hello astronomers! I have already posted this on the Teahouse, but I was told to ask you guys instead. I am working on a list of all of the solar eclipses visible from Canada, and I have a question regarding how the list entries are classified. What exactly determines if only a "sliver" of the subdivision was in the path of the eclipse (and would therefore have a dagger next to its entry)? Is it subjective, or is there a concrete definition? Thanks! ✶Antrotherkus✶^✶talk✶ 20:04, 14 August 2024 (UTC)

Link to draft for reference. Primefac (talk) 12:41, 15 August 2024 (UTC)

To answer the question, though... I don't know if that's particularly useful information. Is it really relevant to know whether something passed across the entirety of Nunavut, half of it, or a quarter of it? I wouldn't bother including that information, and would probably make the argument that such information could be removed from any existing articles (though I'm willing to be persuaded otherwise). Primefac (talk) 12:43, 15 August 2024 (UTC)

In my opinion the vast majority of these eclipse articles are not notable, amounting to data, not knowledge. Johnjbarton (talk) 15:19, 15 August 2024 (UTC)

Agreed, and AFD has supported that opinion for the most part, but that's somewhat of a different discussion. Primefac (talk) 17:53, 15 August 2024 (UTC)

Sorry if you think that my draft isn't that great. I'm mainly just copying from the already-existent list of solar eclipses visible from the United States, meaning that I am using the same key (daggers included) as that article. ✶Antrotherkus✶^✶talk✶ 18:00, 15 August 2024 (UTC)

Never said the draft wasn't great, I just don't see the "sliver" information being particularly useful. Primefac (talk) 18:02, 15 August 2024 (UTC)

Multiple issues with List of largest exoplanets

Hi,

There is an ongoing discussion in the talk page of the List of largest exoplanets, regarding the accuracy of large radii calculated from the luminosities of young planets surrounded by dust, usage of artist's impressions, and miscellaneous notes. The specific discussion can be found in Talk:List of largest exoplanets#Multiple issues. Nrco0e (talk • contribs) 21:17, 10 August 2024 (UTC)

Pinging this section, as the above talk page could use some more opinion on the value of artists' illustrations. - Parejkoj (talk) 14:59, 16 August 2024 (UTC)

Exception for WP:Toosoon and WP:SOURCES?

In this edit to Hubble's law @Banedon added content based on an unpublished and uncited ArXiv paper:

• Freedman, Wendy; et al. (12 August 2024). "Status Report on the Chicago-Carnegie Hubble Program (CCHP): Three Independent Astrophysical Determinations of the Hubble Constant Using the James Webb Space Telescope".

The claim added is very mild. Bandon has made the case in Talk:Hubble's law that this source should be allowed.

Since I routinely revert additions based on newly published papers let alone ArXiv preprints, I would like consensus on this exception. I would say the exception is based on the consortium of authors being a form of review, the YouTube video review, and the mild nature of the claim.

Please respond on Talk:Hubble's_law#Update_potentially_needed_for_Hubble_Tension_section?. Thanks.

(Posted to WikiProject physics and astronomy) Johnjbarton (talk) 15:10, 17 August 2024 (UTC)

Freedman's group do good work, and are probably correct, but we should wait for publication and some citations, just like we do with everything else. - Parejkoj (talk) 15:45, 17 August 2024 (UTC)

Epoch (cosmology)

"Epoch" seems to be used in astronomy to mean a point in time, eg the first instant of a calendar. In cosmology it seems to be a synonym for "era". Does anyone have a reference to this effect? "I have seen it used ..." is not helpful because we can't cite our own experience its not exactly verifiable ;-) Johnjbarton (talk) 18:01, 16 August 2024 (UTC)

What do you mean "this effect?" It's just a difference in use of a term. In astrometry, epoch is the date of the observation (Julian Epoch Year), in cosmology it's "that period of time" (e.g. the epoch of reionization). I'm a bit surprised at that redirect, but I guess it's reasonable. - Parejkoj (talk) 15:44, 17 August 2024 (UTC)

Sorry I meant: Does anyone have a reference discussing how the word "Epoch" has a different meaning in cosmology? Johnjbarton (talk) 17:31, 17 August 2024 (UTC)

The word epoch covers both definitions. I don't think it's unique to cosmology. Praemonitus (talk) 20:23, 17 August 2024 (UTC)

The third definition: "(chronology, astronomy, computing) A specific instant in time, chosen as the point of reference or zero value of a system that involves identifying instants of time." matches Epoch (astronomy) which says

• In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity.

The close connection between cosmology and astronomy would have lead me to think the same word would have the same meaning. That's why I was surprised. Johnjbarton (talk) 22:13, 17 August 2024 (UTC)

Draft:Comet C/2023 V4 (Camarasa-Duszanowicz)

Please will a specialist review this draft with a view to accepting it or offering the creating editor advice]] 🇺🇦 Fiddle^Timtrent Faddle^Talk to me 🇺🇦 10:19, 29 August 2024 (UTC)

I don't think this comet is notable. It received little coverage outside the usual databases (not even dedicated astronomy news sites mention it). --C messier (talk) 20:18, 30 August 2024 (UTC)

Good article reassessment for Archaeoastronomy

Archaeoastronomy has been nominated for a good article reassessment. If you are interested in the discussion, please participate by adding your comments to the reassessment page. If concerns are not addressed during the review period, the good article status may be removed from the article. Z1720 (talk) 15:50, 31 August 2024 (UTC)