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Does anyone know anything about the source of the name "Cthonian"?
Or furthermore, the difference between "Cthonian" and "Chthonian"? Laguna72 17:47, 27 Nov 2004 (UTC)
The article currently states that "Some scientists suggest that Mercury is a Chthonian planet due to its high density and metal-rich core", this seems like quite a bizarre view and I've certainly never heard of this theory of Solar System formation before. It needs to be stated who these some scientists are, so I've added a Citation needed tag to the sentence. -- Hibernian 18:54, 9 March 2007 (UTC)
Mars, Not Mercury - How does this differ from Mars? Most of its atmosphere has been depleted by the sun. I realize this is a stretch, as Mars is definitely a terrestrial planet. Just a though. 67.245.160.60 ( talk) 23:19, 16 November 2016 (UTC)
Please add a spelling (sound) link to the name.-- Mazarin07 19:47, 7 May 2007 (UTC)
How about super-Neptune / eroded-Saturn HD 149026 b. Or is this article meant for Jupiter-class coreless planets? -- Zimriel ( talk) 23:00, 26 August 2008 (UTC)
How about this planet: COROT-7b? This planet seems to be the first Chthonian planet discovered. Should we add it to this article? Maaf ( talk) 02:44, 13 June 2009 (UTC)
Should the line "COROT-7 b may be the first chthonian planet discovered.[2][3] Kepler-10b is also the second chthonian planet found" read "COROT-7 b may be the first chthonian planet discovered,[2][3], followed by Kepler-10b" ? The way it is written now is a bit confusing. -- Richardson mcphillips ( talk) 04:32, 27 November 2011 (UTC)
the article states that the planet is a hypothetical class, which means not proven in term of existence. Yet at the same time claim that there have been some such planets discovered. While the term "may be" infers uncertainty, from the way the sentence is styled it appears to be an uncertainty in terms of whether it is the first one discovered(as in other planets might be discovered earlier but not realized as such a planet) as opposed to whether it is actually such a planet. If it is indeed debatable whether the listed planets are Chthonian planets, the sentence needs to be worded better. If the planets are confirmed as Chthonian planet, then the hypothetical class statement needs to be removed. 99.123.198.224 ( talk) 22:05, 11 July 2013 (UTC)
Is it really a chthonian planet? Due to the presence of Kepler-10c, a 42-day period planet, I think it's not possible that Kepler-10b used to be a hot Jupiter as the shortest periods of an outer companion of a hot Jupiter are about 200 days. The shortest period hot Neptunes are also above the orbital periods of 1 day, especially among those orbiting Sun-like stars. The process for outer planets migrating inward (such as the case of planets around Kepler-70 also do not apply to this system. -- Artman40 ( talk) 13:22, 30 January 2014 (UTC)