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Should this article include the image (Hadean.png) that is an artist's impression of the Earth during the Hadean (created by User:Triangulum)? This image was removed on 14 November 2018 by IP user 86.141.111.80, who justified the removal by claiming that the image is original research. The image was restored by User:Vsmith a day later. How realistic is this image? Currently, there is no evidence that this image is supported by scientific research similar to how NASA's artistic impressions of planetary bodies are supported. Can use of the image be justified e.g. on the basis that although it is only a guess, it may be no less wrong than any other artist's impression because nobody will ever know for sure what the Earth looked like in the Hadean? On the other hand it may be completely wrong. My opinion is that this image currently seems to represent original research and therefore I suggest that it should be removed from the article. GeoWriter ( talk) 16:29, 21 December 2018 (UTC)
References
Big chunk of the picture is missing here, with no mention of the geodynamics: the moon arrived early in the Hadean, and started out with a distance somewhere around 50km surface to surface (much discussion needed about this, as different theories yield different results extrapolating backward from current known increase in moon distance - the tidal effects which drive this depend on when how much water existed on earth how early, and how much an early liquid mantle contributed), but it is intimately linked to earth's day length - the rotation period increased as its energy was passed to raise the moon's orbit, but the day was likely to have started out around 6 hours long, which means, in combination with the close moon, that tides of the early ocean would have been perhaps 100 metres high every 1.5 hours!!! This is far too ambitious a project for me to contemplate, but if no one steps up, I may hack up a paragraph about this in a few months. Some discussion of the effect can be found here: /info/en/?search=Earth's_rotation#In_rotational_velocity And here's another discussion of the sort of implications this can lead to: https://www.centauri-dreams.org/2018/02/08/lunar-recession-implications-for-the-early-earth/ 2001:56A:F0E9:9B00:2906:4B4E:36B1:125B ( talk) 11:53, 2 January 2020 (UTC)justSomeWikiReader (and minor grammar and spelling editor).
This website from the ICS suggests Hadean is pronounced with only two syllables, not three. It shows the syllabification is 'Hade-an'. That seems really odd to me but they are an official body regarding such matters. Any ideas? Jason Quinn ( talk) 04:54, 25 February 2023 (UTC)
I intend to rename the section "Subdivisions" to "Proposed subdivisions". There are no subdivisions. And the article on the " lunar geologic timescale" suggests these are not in widespread use. So the section name is kind of misleading and could falsely make a skimming reader "learn" that the Hadean has subdivisions. Jason Quinn ( talk) 14:31, 4 March 2023 (UTC)
This
level-5 vital article is rated B-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
|
|
This page has archives. Sections older than 365 days may be automatically archived by Lowercase sigmabot III when more than 4 sections are present. |
Should this article include the image (Hadean.png) that is an artist's impression of the Earth during the Hadean (created by User:Triangulum)? This image was removed on 14 November 2018 by IP user 86.141.111.80, who justified the removal by claiming that the image is original research. The image was restored by User:Vsmith a day later. How realistic is this image? Currently, there is no evidence that this image is supported by scientific research similar to how NASA's artistic impressions of planetary bodies are supported. Can use of the image be justified e.g. on the basis that although it is only a guess, it may be no less wrong than any other artist's impression because nobody will ever know for sure what the Earth looked like in the Hadean? On the other hand it may be completely wrong. My opinion is that this image currently seems to represent original research and therefore I suggest that it should be removed from the article. GeoWriter ( talk) 16:29, 21 December 2018 (UTC)
References
Big chunk of the picture is missing here, with no mention of the geodynamics: the moon arrived early in the Hadean, and started out with a distance somewhere around 50km surface to surface (much discussion needed about this, as different theories yield different results extrapolating backward from current known increase in moon distance - the tidal effects which drive this depend on when how much water existed on earth how early, and how much an early liquid mantle contributed), but it is intimately linked to earth's day length - the rotation period increased as its energy was passed to raise the moon's orbit, but the day was likely to have started out around 6 hours long, which means, in combination with the close moon, that tides of the early ocean would have been perhaps 100 metres high every 1.5 hours!!! This is far too ambitious a project for me to contemplate, but if no one steps up, I may hack up a paragraph about this in a few months. Some discussion of the effect can be found here: /info/en/?search=Earth's_rotation#In_rotational_velocity And here's another discussion of the sort of implications this can lead to: https://www.centauri-dreams.org/2018/02/08/lunar-recession-implications-for-the-early-earth/ 2001:56A:F0E9:9B00:2906:4B4E:36B1:125B ( talk) 11:53, 2 January 2020 (UTC)justSomeWikiReader (and minor grammar and spelling editor).
This website from the ICS suggests Hadean is pronounced with only two syllables, not three. It shows the syllabification is 'Hade-an'. That seems really odd to me but they are an official body regarding such matters. Any ideas? Jason Quinn ( talk) 04:54, 25 February 2023 (UTC)
I intend to rename the section "Subdivisions" to "Proposed subdivisions". There are no subdivisions. And the article on the " lunar geologic timescale" suggests these are not in widespread use. So the section name is kind of misleading and could falsely make a skimming reader "learn" that the Hadean has subdivisions. Jason Quinn ( talk) 14:31, 4 March 2023 (UTC)