Unmanned spacecraft

Top: The unmanned resupply vessel Progress M-06M (upper-left). Galileo space probe, prior to departure from Earth orbit in 1989 (right). The unmanned ATV-2 Johannes Kepler approaches crewed space station ISS (lower-left). Bottom: Space orbiter Buran was launched, orbited Earth, and landed as an unmanned spacecraft in 1988 (shown at an airshow).

Unmanned spacecraft are spacecraft without people ("man") on board, used for unmanned spaceflight. Unmanned spacecraft may have varying levels of autonomy from human input, they may be remote controlled, remote guided or even autonomous, meaning they have a pre-programmed list of operations, which they will execute, unless otherwise instructed by the Earth. Many habitable spacecraft also have varying levels of robotic features. For example, the space stations Salyut 7 and Mir, and the ISS module Zarya were capable of unmanned remote guided station-keeping, and docking maneuvers with both resupply craft and new modules. The most common unmanned spacecraft categories are robotic spacecraft, unmanned resupply spacecraft, space probes and space observatories. Not every unmanned spacecraft is a robotic spacecraft, for example a reflector ball is a non-robotic unmanned spacecraft.

For a more detailed list see List of Solar System probes.

...
Wikipedia