Talk:List of former planets

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First fifteen asteroids
Shouldn't Astraea through Eunomia be here too? Double sharp (talk) 03:16, 11 July 2017 (UTC)

Paper arguing that that asteroids as a class were considered planets until 1957
Still at the preprint stage mind:

https://arxiv.org/abs/1805.04115

©Geni (talk) 15:01, 16 July 2018 (UTC)


 * The paper has, by now, been published, though I'm not sure about the practicality of adding thousands of entries into the list... AstroChara (talk) 05:00, 24 September 2023 (UTC)

What is the point of the "restored" column?
There has never been a restoration... --ExperiencedArticleFixer (talk) 14:25, 5 August 2019 (UTC)


 * Well, many know how dumb the IAU's definition of a planet is and the fact that just a small amount of IAU astronomers was present during the notorious conference in Prague. Dr Alan Stern, leader of the New Horizons mission, and planetary geologist Dr Kirby Runyon, proposed another definition in 2018 which "restores" (actually Pluto and Eris never "lost" their status as planets because definitions don't change facts) the planet status of the Galilean moons, all other spherical moons, Ceres, Pluto and Eris:
 * A planet is a sub-stellar mass body that has never undergone nuclear fusion and has enough gravitation to be round due to hydrostatic equilibrium, regardless of its orbital parameters.
 * They call this a geophysical planet definition. It should be added into the page and mentioned that according to the geophysical planet definition the status of those bodies as planet is "restored". 212.186.0.174 (talk) 10:59, 21 August 2019 (UTC)

Satellite planet
Why is the Moon not counted among the satellite planets that were removed in the 1700s? The reason for removing the Moon together with the Sun is inconsistent with the inclusion of "satellite planets" in this list.185.100.196.253 (talk) 11:16, 22 February 2023 (UTC)


 * The Moon was referred to as a planet all the way into the end of the 19th century for that matter. AstroChara (talk) 04:57, 24 September 2023 (UTC)