The results of Hera's fly-by could ultimately tell us whether Deimos is a captured asteroid or made from debris from a giant impact on Mars.

Hera spacecraft captured an extraordinary near-infrared image of Mars’ moon Deimos during a flyby of the Red Planet. This marks the first use of Hera’s science instruments, providing a detailed view of Deimos silhouetted against Mars—a rare perspective of the lesser-known Martian moon.

A mission to survey the results of a deliberate crash between an asteroid and a NASA spacecraft has taken stunning images of Mars and its moon Deimos