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 …

Feb 26, 2026 · Learn about its formation, structure, atmosphere, size and distance, moons, and much more.

6 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.

20 hours ago · Elon Musk says he hopes to have the first humans land on Mars by 2028.

Mars has the tallest mountain in the solar system — Olympus Mons, 21 kilometers (13 miles) high, two and a half times taller than Mount Everest. But it lacks the long ranges of mountains, such as the …

May 16, 2022 · Orbiting the sun at a distance of 141.6 million miles (210-million kilometres), Mars is the fourth planet from the sun. With a diameter of 4,228 miles (6,804 kilometres), Mars is the second …