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| Topic | Should Pluto regain its planetary status? |
| adjl 02/28/25 8:00:22 PM #28: | From the page for Exosphere: "Mercury, Ceres and several large natural satellites, such as the Moon, Europa, and Ganymede, have exospheres without a denser atmosphere underneath,[3] referred to as a surface boundary exosphere" Basically, an exosphere is the barest suggestion of an atmosphere, and if just having that is enough to make something a planet, a whole lot of not-planets would be considered planets. --- This is my signature. It exists to keep people from skipping the last line of my posts. ... Copied to Clipboard! |
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