Rover (space exploration)
A rover is a planetary surface exploration device designed to move over the rough surface of a planet or other planetary mass celestial bodies. Some rovers have been designed as land vehicles to transport members of a human spaceflight crew; others have been partially or fully autonomous robots. Rovers are typically created to land on another planet via a lander-style spacecraft, tasked to collect information about the terrain, and to take crust samples such as dust, soil, rocks, and even liquids. They are essential tools in space exploration.
Three different Mars rover designs: Sojourner, MER and Curiosity
Curiosity's wheels on Mars, 2017
Comparison of distances driven by various wheeled vehicles on the surface of the Moon and Mars
The Lunokhod 1 Lunar Rover
A lander is a spacecraft that descends towards, then comes to rest on the surface of an astronomical body other than Earth. In contrast to an impact probe, which makes a hard landing that damages or destroys the probe upon reaching the surface, a lander makes a soft landing after which the probe remains functional.
The lunar surface through the Apollo 16 Lunar Module window shortly after landing
Surveyor 3 on the Moon
Surface of Saturn's moon Titan as seen by the Huygens probe after landing in 2005
The collision of comet 9P/Tempel and the Deep Impact probe