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Fermi Gamma-ray Space Telescope

Orbiter
The Fermi Gamma-ray Space Telescope, formerly called the Gamma-ray Large Area Space Telescope, is a space observatory being used to perform gamma-ray astronomy observations from low Earth orbit. Wikipedia
Launch date: June 11, 2008 at 12:05 PM EDT
Cost: 690 million USD (2008)
Manufacturer: General Dynamics Corp
Dimensions: Stowed: 2.8 × 2.5 m (9.2 × 8.2 ft)
Orbit height: 342 mi
Speed on orbit: 4.716 miles/s