One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at ...

ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

Mars orbits at an average distance of 142 million miles (228 million km) from the sun. Its orbit is about 1.5 times the size of Earth's. Sunlight takes about 13 minutes to get to Mars, while it ...

Stargazers in the U.S. will find the slender form of the crescent moon roughly 20 degrees above the western horizon right at ...

Look for them around 10 p.m. local daylight time, roughly one-quarter up in the western sky. In addition to their closeness ...

MARS AND ITS MOONS. Share full article. Aug. 21, 1877. Credit... The New York Times Archives. See the article in its original context from August 21, 1877, Page 4 Buy Reprints. View on timesmachine.

Mars' moons are not easy to explain. Both are small — Phobos is 16 miles (26km) across at its widest point, Deimos is just 10 miles (16km) — and lumpy, which makes them look like captured ...

The moons of Mars have been enigmas since their discovery. Phobos has a low orbit, about 3,700 miles (6,000 km) above the martian surface, and it zips across the martian sky in just four hours.

While on a flyby of Mars, Hera was able to use three of its imaging instruments to capture images of Deimos, the smaller of Mars' two moons, the ESA said. Deimos is about 15,000 miles from Mars.

On April 24 the U.A.E. announced that its orbiter, Hope, had studied the smaller of Mars’s two moons, Deimos. The spacecraft returned some of the best data and images of Deimos yet from as low ...

The moons’ small size and quirky dimensions led to suggestions that they may be asteroids captured by Mars long ago. Not so, say researchers analyzing data recorded by Hope, which entered orbit ...

As a 10-day-old moon in its waxing gibbous phase, its surface will be 74 percent illuminated from the perspective of Earth. It will be quite bright with a magnitude of -12.3, while Mars will be ...