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 ...

United Launch Alliance’s Atlas V rocket returned to action Sunday with a mission to deploy multiple satellites into geosynchronous orbit for the National Reconnaissance Office and the US Space Force.

An unknown number of satellites that are part of a new U.S. national security initiative to track objects from geosynchronous orbit (GEO) were deployed on Sept. 10 during one of the last Atlas V ...

Geosynchronous Synthetic Aperture Radar (GEO SAR) systems represent a promising frontier in Earth observation technology, offering continuous monitoring of specified regions with exceptionally short ...

It's been decades since humanity first sent a satellite into orbit, and during all this time we kind of become experts at it. What we still haven't mastered yet is extending the life of these ...

SpaceX is set to launch a Falcon 9 rocket carrying two Intelsat satellites on Saturday morning. The launch is scheduled for 11:06 a.m. and has a launch window of 120 minutes. The INTELSAT G-31/G-32 ...

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 ...

Scientists have demonstrated a capability long sought by physicists: transmitting extremely precise time signals through the air between far-flung locations at powers that are compatible with future ...

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 ...

Illustration of congestion in geostationary orbit. Credit: ESA/ID&Sense/ONiRiXEL; CC BY-SA 3.0 WASHINGTON — The U.S. Space Force will evaluate commercial alternatives to its bespoke military ...

Texas-based Firefly Aerospace has secured a new contract with the U.S. Department of Defense to support orbital missions using its Elytra Dawn spacecraft. The contract is part of the Sinequone Project ...