Phobos and Deimos: Mars’s Tiny Moons

Phobos and Deimos are the two small moons orbiting Mars.
Phobos is about 14 miles across, while Deimos is only about 8 miles wide.
Both moons are irregularly shaped, resembling asteroids rather than spheres.
They likely originated as captured asteroids from the nearby asteroid belt.
Phobos orbits Mars extremely close—just 3,700 miles above its surface.
Deimos orbits much farther out at about 14,600 miles.
Phobos is slowly spiraling inward and may crash into Mars in 30–50 million years.
Both moons are covered in craters, with Phobos featuring the giant Stickney Crater.
Their surfaces are made of dark, carbon-rich rock mixed with loose dust.
Future missions may use them as bases for staging human exploration of Mars.