DARPA is preparing to test one of the most ambitious orbital servicing missions ever attempted: a robotic spacecraft capable ...

DARPA has a plan to keep geosynchronous satellites going for years beyond their expiration date. The agency aims to test it ...

DARPA is all set to launch its robotic spacecraft designed to inspect and repair satellites in the geosynchronous orbit as ...

The Robotic Servicing of Geosynchronous Satellites mission, a partnership between DARPA and Northrop Grumman, will result in the first US on-orbit servicing capability, according to company officials.

First, Russia has now joined the fray with the recent arrival of its own suspected inspector (or attack) satellite in GEO.

A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day).

A geosynchronous orbit is a geocentric orbit that has the same orbital period as the sidereal rotation period of the Earth. It has a semi-major axis of 42,164 km (26,200 miles). In the special case of ...