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https://www.youtube.com/watch?v=hwQTH0IGrwE

Martian Moon Eclipses Martian Moon

Video Credit: ESA, DLR, FU Berlin, Mars Express; Processing & CC BY 2.0 License: Andrea Luck

https://apod.nasa.gov/apod/ap240226.html #APOD

#APOD
in reply to (moving) APOD

I did not know that both Deimos and Phobos are basically odd shaped lumps, not rounded balls like Luna. It raises the question as to why our moon is more or less spherical in the first place, and so too, apparently several other satellites of other planets. Why do they have moons at all, and why are some round? Gravitational forces? Wear and tear of an abrasive 'atmosphere' extending far from the planetary mass? Snagged masses that just happened to be passing by?

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