Gravity Probe B (GP-B) was a satellite-based experiment to test two unverified predictions of general relativity: the geodetic effect and frame-dragging. This was to be accomplished by measuring, very precisely, tiny changes in the direction of spin of four gyroscopes contained in an Earth-orbiting satellite at 650 km (400 mi) altitude, crossing directly over the poles.
Delta II is an American space launch system developed by McDonnell Douglas, now part of the Delta rocket family operated by United Launch Alliance. With more than 150 missions and a nearly perfect track record, Delta II has established itself as one of the most successful orbital launch systems.
See Delta DetailsUnited Launch Alliance (ULA) is a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security. ULA was formed in December 2006 by combining the teams at these companies which provide spacecraft launch services to the government of the United States. ULA launches from both coasts of the US. They launch their Atlas V vehicle from LC-41 in Cape Canaveral and LC-3E at Vandeberg. Their Delta IV launches from LC-37 at Cape Canaveral and LC-6 at Vandenberg.
INFO WIKIA batch of satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Note: Name of payload is provisional. First launch of an ultimately 5 reconnaissance satellites for the South Korean Defense Acquisition Program A…
Progress resupply mission to the International Space Station.
A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Note: Payload identity and Cosmos series number uncertain. The Razdan satellite is reportedly a new electro-optical reconnaissance satellite desi…
Officially described as "Satellite-Internet Technology Demonstration Satellite(s)" built by Chinese Academy of Sciences. Probable 3 (?) test satellit…
A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Malligyong-1c (meaning "Telescope-1") is the third attempt by North Korea to launch a satellite officially declared to be for military reconnaissance…
A batch of 22 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Second test flight of the two-stage Starship launch vehicle. The booster is expected to separate 170 seconds into flight and return to land approxima…