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Text and/or other creative content from this version of Dwarf planet candidates was copied or moved into Dwarf planet with this edit on 25 August 2011. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted so long as the latter page exists. |
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This is an old FA promotion, and does not seem to have kept up over the succeeding decade. There are a couple of unsourced paragraphs and other unsourced text, and the prose in many areas has short paragraphs and small sections. Some areas appear not to have received a comprehensive update since early FA. The History of the Concept section is mostly based on 2006/2008 sources, many of which are news or magazine articles rather than higher quality sources which are certainly available. Updates since then are restricted to a brief couple of sentences, which seems insufficient (and is partially sourced to twitter). The Exploration section is paltry, it is where I would expect to find for example an explanation of the reasoning that led to the sentence "Ceres is close to equilibrium, but some gravitational anomalies remain unexplained", which is cited to a Dawn paper. The overall structure of the article has some oddities, why is "Contention regarding the reclassification of Pluto" a separate section so far away from the History of the concept section? The pie charts are causing some image sandwiching, and seem a really odd way to present that data. The source formatting needs some tightening: there's a bare url, and others lack page numbers and access-dates. Others may find more missing areas, it does feel an oddly short article for the scope involved. CMD (talk) 03:52, 14 August 2021 (UTC)
Dwarf planets should only be recognized by the IAU right? — Preceding unsigned comment added by Zachbarbo (talk • contribs) 19:38, 9 November 2021 (UTC)
What is the maximum size of a dwarf planet? — Preceding unsigned comment added by Zachbarbo (talk • contribs) 02:06, 12 November 2021 (UTC)
What about giant planets like the gas giants and ice giants? — Preceding unsigned comment added by Zachbarbo (talk • contribs) 13:40, 13 November 2021 (UTC)
The definition was created for the bodies we know about. There's an obvious division between the giant planets and the terrestrials, but Venus and Mars have to be planets, so the IAU couldn't draw the line there. The next obvious division is between the terrestrials and Eris/Pluto/Ceres, and that's what the IAU chose and what their definition is meant to enshrine. They could've just said "the big eight", but that wouldn't sound very scientific. It's doubtful the IAU definition will work well for other planetary systems, though, and it doesn't work for the early history of even our system.
The next obvious place to draw a line is between planemos and SSSB's, and that was the competing definition of "planet" that was considered by the IAU. And the one that's used by people like Stern and Grundy. But in practice that's a very difficult definition to apply, because we just don't have enough evidence to tell which bodies are planemos. So the IAU definition is practical, whether one agrees with it or not, as long as we don't discover an Earth-sized body in the outer Solar system that throws everything into chaos again the way the discovery of Eris did.
I suspect that if we find an Earth-sized body that is technically a DP, then the IAU will revisit their definition of "planet" and modify it so that the new body counts as a planet. After all, technically Mercury is a SSSB, but everyone ignores that and calls it a planet anyway. — kwami (talk) 21:07, 13 November 2021 (UTC)
Dwarves are supposed to be small. — Preceding unsigned comment added by Zachbarbo (talk • contribs) 01:15, 14 November 2021 (UTC)
Will the IAU officially recognize Gonggong, Quaoar, Orcus, and Sedna as dwarf planets? — Preceding unsigned comment added by Zachbarbo (talk • contribs) 14:19, 12 November 2021 (UTC)
Quote from the 2022 IAU Division F report [1]:
Unexpected ring discovered around dwarf planet Quaoar. A kind of revolution has recently appeared in the field: another Kuiper belt object, Quaoar, hosts also a dense arc embedded in a continuous thinner ring, but that system lies outside Quaoar’s Roche lobe and thus should theoretically not exist. (p 2)
An unexpected ring was discovered around dwarf planet Quaoar (p 5)
Nrco0e (talk) 23:23, 6 December 2023 (UTC)