different between psychroplanet vs mesoplanet

English

psychro- +? planet

psychroplanet (plural psychroplanets)

(astronomy) A habitable planet, such as Mars, that has a surface temperature of ?50 to 0°C, colder than is optimal for most terrestrial life.

meso- +? planet

mesoplanet (plural mesoplanets)

(astronomy) a planet that is between the size of Mercury and Ceres
(astronomy) A habitable planet, such as Earth, that has a surface temperature of 0–50°C, optimal for much terrestrial life.

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