Talk:Earth

Orbital characteristics

The mean anomaly at Epoch J2000 should read 357.517 instead of 358.617 degrees. It is the difference between the mean longitude 100.46435 and the longitude of perihelion 102.94719 (+360 degrees) given by ref [5] the earth's fact sheet by NASA https://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html John Ripfield (talk) 17:53, 7 April 2022 (UTC)

I also note that the time of perihelion is placed in 2022, while the infobox section is said to be relative to J2000. Hopefully someone more experienced in astronomy can take a look; @Ashill: do you have any thoughts? Ovinus (talk) 20:37, 30 April 2022 (UTC)

Semi-protected edit request on 13 May 2022

The mass of the earth is in fact 5.964*10^(24)kg because the equation GMm/r^2; rearranged for M = Fr^2/Gm; 9.80665N*(6371km)^2/G*1kg = x is equal to 5.964*10^(24)kg I could be wrong and qalculate could have a bug but it's worth a try James12Harushi (talk) 07:20, 13 May 2022 (UTC)

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. Dawnseeker2000 07:22, 13 May 2022 (UTC)

Your calculation is correct but it assumes a perfectly spherical Earth with uniform mass when in reality, the Earth is an oblate spheroid, slightly wider at the diameter than the poles and the density of the Earth is probably (not a geologist) non-uniform. The source that is cited for the Earth's mass would've used a more advanced method for calculating the mass resulting in it being more accurate. QuinticFormula🏳️‍🌈 (talk) 11:36, 16 June 2022 (UTC)

Infobox planet does not support tropical year

I have reverted these edits by Nsae Comp in part because they introduced a number, 365.2421897, that is not in the cited source, and then converted that to some kind of year. It is not clear that astronomers normally make such a conversion.

Also it claims this number is the "synodic period". I copy a definition of synodic period from page 656 (in the glossary) of Explanatory Supplement to the Astronomical Almanac 3rd ed., edited by Urban and Seidelmann and published by University Science Books in 2013.

synodic period: the mean interval of time between successive conjunctions of a pair of planets, as observed from the Sun; or the mean interval between successive conjunctions of a satelllite with the Sun, as observed from the satellite's primary.

Since the only celestial bodies being discussed are the Earth and the Sun, and the definition of synodic period requires three celestial bodies, the definition cannot apply. Jc3s5h (talk) 13:52, 5 June 2022 (UTC)

Well as I wrote in the edit comment, the problem is with the infobox template, which does not know a category for tropical year. So I was merely trying to add tropical year with the help of the "synodic year" category of the infobox template. I agree that all definitions of synodic "year" are like the one cited above. But since synodic, as in synodic rotation does indeed just mean the solar day it is not absurd to also understand synodic in connection with "year" in the sense of the solar/tropical year. I have even seen the use "synodic year" for "tropical year", but since I am not being able to provide an in depth source I have to concede to the critique, that useing the "synodic_period" category of the infobox is misleading. Nsae Comp (talk) 16:15, 5 June 2022 (UTC)

With other words, if someone can find a way to have the tropical year in the infobox, that would be great, because it is absurd, that the infobox only features the sidereal year. Nsae Comp (talk) 16:17, 5 June 2022 (UTC)

PS: could you change the title of the talk-page chapter not with my user name? Maybe:"Infobox: tropical year?" Nsae Comp (talk) 04:29, 7 June 2022 (UTC)

I took now the version from the testcase (Template:Infobox planet/testcases#Earth). PS: Maybe other elements from the testcase can be introduced as well? Nsae Comp (talk) 04:39, 8 June 2022 (UTC)

I oppose using the term synodic period with Earth. I oppose using any testcase templates in the article. I oppose adding any number to the article without a clear citation as to where the number comes from. I have reverted your change. Jc3s5h (talk) 10:44, 8 June 2022 (UTC)

Im new here

who were the group of people(s) that created the article on earth?--Footballandgames (talk) 14:13, 19 June 2022 (UTC)

Hi, and welcome to Wikipedia! The article has been written by a large group of editors. You can find a pie chart (and more info) here. You can also look in the history of the article (next to the edit button), but that will be a bit unwieldy for a big article such as this. Femke (talk) 14:32, 19 June 2022 (UTC)

thanks Footballandgames (talk) 14:34, 19 June 2022 (UTC)