Mars
Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.
Mission Status
NASA Spacecraft in Orbit
NASA Rovers on the Surface
Featured Topics
Mars Overview
Mars is no place for the faint-hearted. It’s dry, rocky, and bitter cold. The fourth planet from the Sun, Mars, is one of Earth's two closest planetary neighbors (Venus is the other). Mars is one of the easiest planets to spot in the night sky — it looks like a bright red point of light.
Despite being inhospitable to humans, robotic explorers — like NASA's Perseverance rover and Mars Reconnaissance Orbiter — serve as pathfinders to eventually get astronauts to the surface of the Red Planet.
Evolution of a Martian
Since landing its first rover on Mars in 1997, NASA has pushed the boundaries of exploration with increasingly larger and more sophisticated robotic explorers. Each mission builds on the lessons learned from the Red Planet, leading to breakthroughs in technology and our understanding of Mars.
Learn MoreWhy Do We Go?
Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to explore the alien landscape. NASA missions have found lots of evidence that Mars was much wetter and warmer, with a thicker atmosphere, billions of years ago.
Explore with Us
Mars Relay Network: Communications Bridge Between Mars & Earth
How We Explore
This illustration shows a concept for multiple robots that would team up to ferry to Earth samples of rocks and soil being collected from the Martian surface by NASA's Mars Perseverance rover.NASA/JPL-CaltechMars Sample Return
NASA and ESA (European Space Agency) are planning ways to bring the first samples of Mars material back to Earth for detailed study.
NASA’s Perseverance Mars rover took this selfie, made up of 62 individual images, on July 23. A rock nicknamed “Cheyava Falls,” which has features that may bear on the question of whether the Red Planet was long ago home to microscopic life, is to the left of the rover near the center of the image.NASA/JPL-Caltech/MSSSMars Perseverance Rover (Mars 2020)
The Mars 2020 mission Perseverance rover is the first step of a proposed roundtrip journey to return Mars samples to Earth.
NASA's Curiosity Mars rover used two different cameras to create this selfie in front of Mont Mercou, a rock outcrop that stands 20 feet (6 meters) tall. The panorama is made up of 60 images taken by the Mars Hand Lens Imager (MAHLI) on the rover's robotic arm on March 26, 2021, the 3070th Martian day, or sol, of the mission. These were combined with 11 images taken by the Mastcam on the mast, or "head," of the rover on March 16, 2021, the 3,060th Martian day of the mission.NASA/JPL-Caltech/MSSSMars Curiosity Rover (Mars Science Laboratory)
Curiosity is investigating Mars to determine whether the Red Planet was ever habitable to microbial life.
This illustration shows the MAVEN spacecraft and the limb of Mars.NASA/GSFCMAVEN
The Mars Atmosphere and Volatile EvolutioN (MAVEN) mission is the first mission devoted to understanding the Martian upper atmosphere.
This artist's concept shows NASA's Mars Reconnaissance Orbiter mission over the red planet. NASA launched this multipurpose spacecraft to advance our understanding of Mars through detailed observation, to examine potential landing sites for future surface missions and to provide a high-data-rate communications relay for those missions. The orbiter's shallow radar experiment, one of six science instruments on board, is designed to probe the internal structure of Mars' polar ice caps, as well as to gather information planet-wide about underground layers of ice, rock and, perhaps, liquid water, which might be accessible from the surface.NASA/JPLMars Reconnaissance Orbiter
Mars Reconnaissance Orbiter searches for evidence that water persisted on the surface of Mars for a long period of time.
NASA's Mars Odyssey spacecraft passes above Mars' south pole in this artist's concept illustration. The spacecraft has been orbiting Mars since Oct. 24, 2001.NASA/JPL-CaltechMars Odyssey
Mars Odyssey mission created the first global map of chemical elements and minerals that make up the Martian surface.
News & Features
Beyond the Moon
Humans to Mars
Like the Moon, Mars is a rich destination for scientific discovery and a driver of technologies that will enable humans to travel and explore far from Earth.
Mars remains our horizon goal for human exploration because it is one of the only other places we know in the solar system where life may have existed. What we learn about the Red Planet will tell us more about our Earth’s past and future, and may help answer whether life exists beyond our home planet.
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