Deimos (/ ˈ d aɪ m ə s /; systematic designation: Mars II) [11] is the smaller and outer of the two natural satellites of Mars, the other being Phobos. Deimos has a mean radius of 6.2 km (3.9 …

Nov 3, 2024 · Deimos orbits Mars every 30 hours. Although both moons are heavily cratered, Deimos has a smoother appearance caused by the partial filling of some of its craters. Deimos …

Compared to the Earth's Moon, the moons Phobos and Deimos are small. Phobos has a diameter of 22.2 km (13.8 mi) and a mass of 1.08 × 10 16 kg, while Deimos measures 12.6 km (7.8 mi) …

Apr 26, 2023 · Deimos is the smaller of Mars’ two moons, measuring just 9 by 7 by 6.8 miles, per NASA. The other, Phobos is a bit larger, at 17 by 14 by 11 miles. Phobos has been well …

Mar 17, 2025 · New images of the mysterious Martian moon Deimos were captured on March 12 when the European Space Agency‘s (ESA) Hera mission activated its instruments for the first …

Apr 25, 2023 · Deimos is just nine miles across on its longest side, and completes an orbit of Mars every 30 hours at an altitude of 15,000 miles. The moons’ small size and quirky …

Apr 2, 2025 · Deimos, the outer and smaller of Mars’s two moons. It was discovered telescopically with its companion moon, Phobos, by the American astronomer Asaph Hall in 1877 and …

Deimos is the smaller outer moon of Mars (the inner moon is Phobos.) Deimos is composed of rock rich in carbonaceous material. Although the surface is noticeably smoother than Phobos it …

May 3, 2023 · Stunning new views of Deimos, one of Mars’ two strange moons, hint at questions about how the martian moons formed in the first place — and why they are still in orbit around …

Nov 24, 2024 · Using supercomputer simulations, a team of NASA scientists recently modeled the destruction of an asteroid around Mars to investigate the possible origins of Mars’ two, …