A satellite for detecting artificial objects in the vicinity of a planet, a planetoid or similar celestial body, wherein the satellite is configured to move around the planet, planetoid or similar celestial body along one or more of an equatorial orbit, an orbit close to the equator, a polar orbit, and an orbit close to a pole of the planet, planetoid or similar celestial body, comprising:
- one or more sensors configured to observe at least one or more of said artificial objects against a cold space background, said one or more sensors having a the field of view pointing in a direction tangential to the planet, planetoid or similar celestial body;
- and
- a transmitter configured to transmit data generated by said one or more sensors regarding said one or more artificial objects.