The OEO satellite promises a geosynchronous orbit around the equator, low latency, and a drastic cut in costs—using readily available technology. Thousands of satellites have been deployed during ...

The world’s leading space powers desperately want to know what the others are up to high above the equator. For more than a decade, the US military has operated a fleet of “inspector” satellites ...

Satellites cannot be left floating in space and must be disposed of. Here's how engineers handle it.

DARPA is preparing to test one of the most ambitious orbital servicing missions ever attempted: a robotic spacecraft capable of repairing and upgrading satellites located 22,236 miles above Earth. The ...

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).