Glossary · Celestial objects
Mars
The fourth planet of the Solar System, nicknamed the Red Planet due to iron oxide on its surface. Mars is the prime target for robotic exploration: rovers, orbiters and landers search for past traces of life and study its climate.
Definition
The fourth planet of the Solar System, nicknamed the Red Planet due to iron oxide on its surface. Mars is the prime target for robotic exploration: rovers, orbiters and landers search for past traces of life and study its climate.