In 1971 Mariner 9 entered orbit around Mars, being the first spacecraft to orbit any body other than the Moon, Sun or Earth; following in the same year were the first uncontrolled impact (Mars 2) and first …

6 days ago · Learn about its formation, structure, atmosphere, size and distance, moons, and much more.

5 days ago · Mars is the fourth planet in the solar system in order of distance from the Sun and the seventh in size and mass. It is a periodically conspicuous reddish object in the night sky. There are …

Mars once had liquid water on its surface and could have supported life. Scientists are uncovering how Mars transformed into the cold, dry desert world it is today.

May 20, 2025 · A guide to the Red Planet, Mars, including facts about its geology, a history of Mars missions and images captured by astrophotographers.

NASA’s real-time portal for Mars exploration, featuring the latest news, images, and discoveries from the Red Planet.

Feb 17, 2026 · Scientists may be one step closer in their hunt for signs of past life on Mars after the Curiosity rover's latest find.

1 day ago · Learn about geologic formation on Mars that resemble spiderwebs, serving as records of ancient groundwater flow on the planet.

Jan 19, 2026 · Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to roam the alien landscape. NASA missions have found lots of evidence …

3 days ago · Mars - Red Planet, Orbit, Moons: Mars is the fourth planet out from the Sun. It moves around the Sun at a mean distance of 228 million km (140 million miles), or about 1.5 times the …