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Cosmic Background Explorer

Spacecraft
The Cosmic Background Explorer, also referred to as Explorer 66, was a NASA satellite dedicated to cosmology, which operated from 1989 to 1993. Its goals were to investigate the cosmic microwave background radiation of the universe and provide... Wikipedia
Launch date: November 18, 1989 at 9:34 AM EST
Cost: 160 million USD (1989)
Orbit height: 559 mi
COSPAR ID: 1989-089A
Dimensions: 5.49 × 2.44 m (18.0 × 8.0 ft)