In
planetary geology
Planetary geology, alternatively known as astrogeology or exogeology, is a planetary science discipline concerned with the geology of celestial bodies such as planets and their moons, asteroids, comets, and meteorites. Although the geo- prefix t ...
, a saxum (, plural saxa) is a large surface boulder on an extraterrestrial body. So far the term has been used for:
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''Saxum'' is the Latin word for a rock. The feature name was introduced in 2019 for the
Hayabusa 2 asteroid mission to Ryugu.
Planetary geology
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