Launched in 2005, the Mars Reconnaissance Orbiter continues to study the Red Planet from orbit with the highest-resolution camera ever sent to another planet, providing detailed imagery of the surface while searching for evidence of past water activity and potential landing sites for future missions.

A stationary lander that touched down on Mars in 2018 and studied the planet's internal structure through seismology until December 2022, detecting over 1,300 marsquakes and revealing the size and composition of Mars' core.

Earth

A life-bearing terrestrial planet with a significant atmosphere, active geology, and a large moon, distinguished by its vast oceans of liquid water and diverse ecosystems that make it unique in the Solar System.