Mars, Phobos
An astronomer is suggesting that Mars once had a large moon that exerted enough force to create a large bulge on its surface.
Minuscule meteoroids slamming into the lunar surface could be kicking up most of the atoms that make up the lunar exosphere.
Unlike the other planets in the solar system, Mars is distinctly triaxial, meaning it is an ellipsoid with different sizes ...
A third Martian moon around a third the size of our own could explain the anomaly. Mars's current satellites Phobos and ...
We are all familiar with our one Moon but other planets have different numbers of moons; Mercury has none, Jupiter has 95 and ...