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 ...

A Long March 3B lifts off from Xichang on Aug. 12, 2023, carrying the Ludi Tance-4 (01) satellite into GTO. Credit: Ourspace HELSINKI — China launched what is thought to be the world’s first ...

A spacecraft fitted with two flexible robotic arms is on the way to geosynchronous orbit after launching earlier this week on a SpaceX Falcon 9 rocket, kicking off a planned decade-long mission to ...

Apophis will make an exceptionally close but safe pass by Earth on April 13, 2029. Its path will dip inside the altitude of ...

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 ...

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 ...

Earth’s geosynchronous orbit (GEO) holds some of the most valuable satellites that carry out tasks for phones, television, and radio, as well as weather and environmental monitoring. As new research ...

WASHINGTON — A United Launch Alliance Vulcan Centaur rocket lifted off early Feb. 12 on a multi-manifest national security mission, sending payloads directly to geosynchronous orbit more than 22,000 ...

For decades, geosynchronous orbit (GEO) has operated under a simple assumption: Satellites stay put. That assumption no longer holds. A small but significant subset of Chinese satellites are moving ...

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).

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 ...

Last year, scientists drove up Mauna Loa volcano on Hawai'i, aimed a laser at a reflector positioned on Haleakala peak on Maui, and beamed rapid pulses of laser light through 150 kilometers of ...