List of active Solar System probes

This is a list of active space probes which have escaped Earth orbit.

It includes lunar space probes, but does not include space probes orbiting at the Sun–Earth Lagrangian points (for these, see List of objects at Lagrangian points).

A craft is deemed "active" if it is still able to transmit usable data to Earth (whether or not it can receive commands).

For example, though Voyager 1 is still contactable en-route to the Oort Cloud and has exited the Solar System, it is listed as "mission complete" because its primary task of studying Jupiter and Saturn has been accomplished.

Once a probe has reached its first primary target, it is no longer listed as "en route" whether or not further travel is involved.

Solar System space probes operational as of November 2024
The oldest active spacecraft for Mars is 2001 Mars Odyssey
Montage of planets and some moons that the two Voyager spacecraft have visited and studied, still active in the 2020s they are heading out into interstellar space returning data from newly explored distances