Science

Unlocking the Secrets of Deimos: A Rare Close-Up of Mars' Underdog Moon

2025-04-22

Author: Liam

You probably don't give much thought to Deimos, the smaller of Mars' two moons, whimsically named after the Ancient Greek god of dread. But could this tiny celestial body be hiding some intriguing secrets?

While Phobos, the larger moon, often steals the spotlight with plans for future human visits to Mars, let’s shine a light on its lesser-known sibling. Phobos boasts a radius of 11 km and orbits just over 9,000 km from Mars' surface, making it more accessible and prominent in the Martian night sky.

In stark contrast, Deimos measures a mere 6 km in radius and sits far out at over 23,000 km from Mars. Its diminutive size means that, from the Martian surface, it shines no brighter in the night sky than Venus does from Earth—hardly a beacon of interest.

Yet, who doesn’t love an underdog? Scientists are exploring innovative possibilities for Deimos, from utilizing its sandy surface for aerobraking large missions to the Martian surface to potentially returning samples from this enigmatic moon. Perhaps one day, Deimos will claim its moment in the spotlight!

Recently, we were lucky enough to catch one of the best views of Deimos yet! The European Space Agency's Hera mission, which is headed towards the asteroid Didymos, made a thrilling detour through the Martian system. It flew within a striking 300 km of Deimos, capturing a stunning—albeit artificially colored—image with its Asteroid Framing Camera.

This close encounter offers a rare glimpse at one of the smallest known moons in our Solar System, igniting curiosity about what Deimos may reveal in the future. Who knows? This little moon might just hold more surprises than we ever expected!