Talk:Ganymede (moon)

WP:URFA/2020

Looking at this article for WP:URFA/2020 and also for a potential TFA on 2020-12-21:

• The article had three different date styles (mdy, dmy and ISO): I picked what I thought the most common and ran the script. But since Jupiter and Saturn use dmy, I wonder if the dates here should be the same.
• There are considerable duplicate links. See WP:OVERLINK, but some may be deemed necessary and retained (editor discretion). Installing this script will add an item to your toolbox that shows duplicate links in red: User:Evad37/duplinks-alt  Done
• There are MOS:SANDWICH and image layout problems everywhere. If knowledgeable editors will delete those that are least useful (decorative), I am willing to go through and improve the layout. There are considerable images here that are not aiding our understanding of the topic; by reducing those, we can get a better layout on the ones that stay.  Done
• External links probably could benefit from a trim, per WP:ELNO. FAs are supposed to be comprehensive, meaning there should be little in EL that can't be covered in the article. Do these add something to the article that we can't cover in a comprehensive article?
• The article appears to be well cited, but should be reviewed for uncited or outdated text.

SandyGeorgia (Talk) 20:20, 8 December 2020 (UTC)

If I may be so bold, I'll check off ones I've tried to take care of as I find the time, here and on the other talk pages mentioned at the linked discussions - Astrophobe (talk) 23:18, 8 December 2020 (UTC)

Formatting probably still needs work and the page feels a bit cramped to me, but there are no more MOS:SANDWICH issues. - Astrophobe (talk) 23:38, 8 December 2020 (UTC)

• Cite error: A list-defined reference named "cwgjupgany" is not used in the content (see the help page). SandyGeorgia (Talk) 14:13, 9 December 2020 (UTC)

Lede is far too long.

The lede for this article should be edited down, and many of the details therein should be moved to the main body of the article, or removed completely. The lede should be a para or two, at most. Why even have sections if we're going to put all the details at the very top? 73.6.96.168 (talk) 13:43, 4 June 2021 (UTC)

Per WP:LEDE it can be up to 4 paragraphs long. Ruslik_Zero 20:26, 4 June 2021 (UTC)

Need better image

The current infobox image of Ganymede has been bothering me for a pretty long time now. Ganymede appears visibly squashed in the image as a result of reprojecting JunoCam's large field of view to a smaller one. Nowhere in the article is this effect mentioned, which means that this image can be misleading to readers. I propose that it should be replaced with a better-quality image like File:Ganymede JunoGill 2217.jpg, although I'm not sure how to deal with that image's watermark. File:Juno Sails by Ganymede.jpg could also be another option, though I prefer the previous image since I believe the less-saturated version is closer to Ganymede's "true color". Notifying active editors @Kwamikagami:, @Double sharp:, @Modest Genius:, and @Praemonitus:. Nrco0e (talk · contribs) 06:22, 13 April 2022 (UTC)

Any of those would be fine with me. I'm used to the more saturated appearance, but if Ganymede is greyer than that, agreed it would be better to show that in the lead img. My issue with most of these photos is the way they're clipped. IMO, best to center the moon in the image, rather than just the sunlit portion. so that one has a better idea of how much of the surface is shown. — kwami (talk) 06:32, 13 April 2022 (UTC)

Yes, something like Triton. Agree with kwami re colour. Double sharp (talk) 03:58, 15 April 2022 (UTC)

moon

moon is a work of art😍 154.97.20.12 (talk) 18:24, 5 July 2022 (UTC)

Atmosphere

Lede says Ganymede has no atmosphere, then says it has a thin oxygen atmosphere. Can these statements be reconciled? Stevebritgimp (talk) 14:05, 15 April 2023 (UTC)

Yes, I noticed that too, just today when I first read this page.

What is the procedure to try and make a change? Stormbird (talk) 07:13, 10 October 2023 (UTC)

Ganymede has a surface pressure of only 1.2 μPa (10⁻¹¹ atm) so it has an Exosphere. "Atmosphere" also is also formally correct but, as with Earth's moon, with so low pressure nobody intend it as such (see Exosphere article) Pippo skaio (talk) — Preceding undated comment added 15:51, 19 October 2023 (UTC)

Name globalisation

I changed the following sentence: The Galilean satellites retain the Italian spellings of their names. IMHO, there were several doubtful parts of this statement. First, the Gallilean moons have different names in different languages. Second, there was probably no original spelling to "retain", since both in the seventeenth and in the nineteenth centuries European scolars in general had linguistic capacities in more than one language, and were used to translate also proper names when switching from one language to another. (In the twentieth century, and so far in the present one, there is a more widespread opinion that "names don't translate". This thought mode seems to be fairly modern, though.) Third, actually, the English and the Italian spelling of this particular name do differ.

As you easily can find out from inspecting the names of the interwiki sisters to this article, there are quite some variations of the spelling. The nordic languages (Swedish, Danish, Norwegian, Icelandic) uses the Latin form Ganymedes (as do Czech and Dutch). Other forms include Ganymede, Ganimedes, Ganimede (which incidentally is the Italian form), and quite a lot of forms ending in -med. I guess (OR-warning!) that often the form that the mythological prince Ganymede already had in the respective language was employed. (That this at least not always could be the rule, may be seen from the English name of the largest planet in our solar system; I believe that it rather seldom is called Jove.)

(@Kwamikagami: I think you added this sentence to the article.) Regards, JoergenB (talk) 15:33, 31 July 2024 (UTC)

I don't recall writing that. I wrote (maybe not here) that i.a. Italian and Russian use the Latin oblique as the base of their names, while i.a. English and French use the nominative. But English uses the oblique form for the adjective, thus Iris but Iridian; the latter resembles the Russian name Ирида and the Italian Iride. Though, under French influence, languages sometimes drop the final vowel or consonant, and, at least on WP-it, Italian is switching to the IAU nominative forms for the names of their articles, with the traditional oblique form listed in the lead as the "Italian" name.[1] This is because (according to the people moving the articles on WP-it) astronomical articles written in Italian now usually follow IAU naming, suggesting that a split may be developing between astronomical and mythological names. I haven't seen this for Russian; as with many things, I suspect this is due to Russian not using the Latin script except for clarification. Japanese is similarly resistant to normalizing Western names to international standards written in Latin script, and I suspect that's a general pattern internationally. (Biscriptal Serbian would be a good test of that idea.) — kwami (talk) 21:04, 31 July 2024 (UTC)

Given that the claim itself is unsourced (yikes!) and that it is relatively trivial content, it may be best to remove it. ArkHyena (talk) 22:14, 31 July 2024 (UTC)

I think it's worth mentioning that we use the French form of the name (dropping the last syllable) rather than the form expected from Greek Ganymedes, with a concomitant shift in stress (just corrected the IPA), but yeah, I don't see how Italian is relevant. I changed that to Latin. — kwami (talk) 23:05, 31 July 2024 (UTC)

Fair point. Now I suppose we just have to find some sources for these statements... ArkHyena (talk) 23:25, 31 July 2024 (UTC)

Couldn't find anything for French, though i have noticed its influence in astronomical names in various languages. Including Italian, if I remember correctly. — kwami (talk) 00:54, 1 August 2024 (UTC)

Thanks for the improvements, all of you! (My reason for prompting @Kwamikagami was this old edit, which made me think they might be interested.) JoergenB (talk) 12:42, 1 August 2024 (UTC)

Evidently I did write that. Maybe I thought the original naming was in Italian? But Marius wrote in Latin, and apparently spelled them Io, Europa, Ganimedes, Calisto. — kwami (talk) 12:50, 1 August 2024 (UTC)

Featured picture scheduled for POTD

Hello! This is to let editors know that File:Ganymede -_Perijove_34_Composite.png, a featured picture used in this article, has been selected as the English Wikipedia's picture of the day (POTD) for September 17, 2024. A preview of the POTD is displayed below and can be edited at Template:POTD/2024-09-17. For the greater benefit of readers, any potential improvements or maintenance that could benefit the quality of this article should be done before its scheduled appearance on the Main Page. If you have any concerns, please place a message at Wikipedia talk:Picture of the day. Thank you!  — Amakuru (talk) 10:10, 11 September 2024 (UTC)

Ganymede is a moon of Jupiter and the largest and most massive satellite in the Solar System. It is the largest Solar System object without a substantial atmosphere and also the only moon in the Solar System with a substantial magnetic field. Like Titan, Saturn's largest moon, it is larger than the planet Mercury but, due to its lower density, has somewhat less surface gravity than Mercury, Io, or the Moon. Ganymede is composed of silicate rock and water in approximately equal proportions. It is a fully differentiated body, with an iron-rich liquid core and an internal ocean. Ganymede orbits Jupiter in roughly seven days and is in a 1:2:4 orbital resonance with Europa and Io. This image, a composite of three photographs taken by the NASA space probe Juno during a flyby in 2021, depicts the northern hemisphere of Ganymede roughly centered around the prime meridian.

Photograph credit: NASA / JPL-Caltech / SwRI / MSSS / Kevin M. Gill

Recently featured:

• Pomacanthus maculosus
• William Howard Taft
• Il trovatore

So this one guy saw this without a telescope and nobody else in the world ever did

SERIOUSLY?! 2604:3D09:D78:1000:AC07:AD3B:6D36:A29B (talk) 05:05, 4 October 2024 (UTC)

People have seen the Galilean moons without a telescope in modern times – but it is no doubt easier when you already know they exist. Double sharp (talk) 06:12, 4 October 2024 (UTC)