Tuesday Telescope: A rare glimpse of one of the smallest known moons

arstechnica.comPublished: 4/22/2025

Summary

On a night when the universe's quiet corners often go unadvertised, the tiny Martian moon Deimos takes center stage. This underdog of the solar system, much smaller than its companion Phobos but no less intriguing, has captivated scientists with its potential uses—everything from aerobraking future Mars missions to serving as a sample return destination. A recent flyby by the European Space Agency's Hera spacecraft brought Deimos into sharper focus, revealing this dim yet breathtaking world. Yet, much like its celestial competitors, Deimos' story often gets overshadowed by the more flashy tales of Phobos and other bright lights in the night sky.