NASA's Rossi X-ray Timing Explorer (RXTE) mission finally ended after spending more than 22 years in space. The 6,700-pound spacecraft burned up in the atmosphere during its reentry earlier this...
NASA's Rossi X-ray Timing Explorer (RXTE) mission finally ended after spending more than 22 years in space. The 6,700-pound spacecraft burned up in the atmosphere during its reentry earlier this...