Talk:Ceres (dwarf planet)
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Lede & bright spots
The largest paragraph of the lede is spent detailing a blow by blow account of the quest to determine what the 'bright spots' on Ceres are. It seems to me that this is too much detail for the lede which should just contain a summary of what was found and maybe detail what questions are still open. Would anyone object to this change? Ashmoo (talk) 11:26, 21 November 2016 (UTC)
- Yeah, that paragraph could use some trimming. Go for it. Sario528 (talk) 13:17, 22 November 2016 (UTC)
Ceres content appears to be incorrect
is the largest object in the asteroid belt that lies between the orbits of Mars and Jupiter. Its diameter is approximately 945 kilometers (587 miles), making it the largest of the minor planets within the orbit of Neptune. The 33rd-largest known body in the Solar System, it is the only dwarf planet within the orbit of Neptune.
As stated, Ceres is the largest object in the asteroid belt. Neptune is not an object within proximity of the asteroid belt. I believe the reference to Neptune to be an error. — Preceding unsigned comment added by 188.8.131.52 (talk) 17:21, 12 December 2016 (UTC)
- What do you think the error is? The asteroid belt is within the orbit of Neptune, i.e., it is always closer to the sun than Neptune. - DinoSlider (talk) 17:36, 12 December 2016 (UTC)
- I imagine he thinks it should read "Jupiter", expecting that it would be logical to limit the clause to the inner solar system, since all of the other dwarf planets are in the outer solar system. "Neptune" might seem like a random choice, if you're used to thinking of it as one of the planets in the middle (with Pluto being further out). Of course, since (at least according to the IAU) Neptune is the outermost planet, it makes some sense to use it as the delimiter. That's what I think the question was about. However, in one sense he's correct; Pluto is currently classified as a dwarf planet, and its orbit overlaps that of Neptune, so that for part of the time it's within the orbit of Neptune... in which case, the delimiter would have to be Uranus. You might reasonably argue that because Pluto's orbit is larger and mostly beyond Neptune's, the statement is still accurate. Or that it's accurate because Pluto is currently beyond Neptune's orbit, and will remain outside it for a number of years. But a reader might reasonably infer from the statement that no dwarf planets orbit within the limits of the major planets, which isn't quite the case. I imagine this would best be cleared up by a footnote. P Aculeius (talk) 17:53, 12 December 2016 (UTC)
- Perhaps that sounded even more confusing. That'd require a footnote to explain the counter-intuitive idea of a dwarf planet partially within the orbit of Neptune, whereas the one I added explained an exception to a clearer statement. At least I think it's clearer to state something and then give an exception, than to say that somehting is and isn't, and then explain what you mean by that. P Aculeius (talk) 20:01, 12 December 2016 (UTC)
- It's presumably a reference to the Oort cloud or something. Neptune marks the edge of the solar system as you would normally think of it. I think there is, or may be, a larger dwarf planet beyond Neptune.GliderMaven (talk) 02:22, 13 December 2016 (UTC)
Please explain "a body in hydrostatic equilibrium with partial differentiation and isostatic compensation"
I think this is a bit dense for the rest of us who did not take that upper division course in planetary geology. If we could get someone to explain for us mere mortals who just wanted to use an encyclopedia, I'm sure many would appreciate it. Jyg (talk) 06:03, 28 March 2017 (UTC)
One of the maps is described (by NASA) as "Mercator" but clearly isn't. A Mercator map is conformal, so that all the craters should be nearly round; this makes for stretching at higher latitudes so that the poles are at infinity. Can you tell what mapping it is? Is it equal area, or equirectangular? —Tamfang (talk) 18:17, 9 April 2017 (UTC)
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