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).

Next SpaceX launch from Florida won't deliver Starlink satellites. It is set for late Monday, on a unique trajectory with a ...

SpaceX is targeting Monday, March 9 for a Falcon 9 launch of the EchoStar XXV mission to geosynchronous transfer orbit from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in ...

Reports suggest that the US Space Force is pausing missions on the Vulcan rocket until an anomaly observed during a February ...

HELSINKI — China appears to have considered boosting its space situational awareness capabilities by placing a satellite in a retrograde orbit out at the geostationary belt. A paper published in ...

A small asteroid came within a cosmic hairbreadth of the ring of communications satellites circling the Earth in geosynchronous orbit this week. Passing by our planet at an altitude of about 35,000 km ...

Under the new GHOST-R effort, the Defense Innovation Unit hopes to have a high-resolution bird operating on orbit within 24 months.

Space Operations Command has accepted Geosynchronous Space Situational Awareness Program (GSSAP) satellites 5 and 6 as operationally capable and has presented them to United States Space Command for ...

Two Chinese satellites have rendezvoused with one another more than 20,000 miles above the Earth in what analysts believe is the first high-altitude attempt at orbital refueling. China’s Shijian-21 ...

Engineers at the U.S. Naval Research Laboratory's (NRL) Naval Center for Space Technology (NCST) recently completed robotic payload component level testing for the Defense Advanced Research Projects ...