NASAs Neil Gehrels Swift Observatory has ended its science mission now that the spacecraft is orbiting less than 171 miles (275 kilometers) above Earths surface. The greater atmospheric drag at this height prevents the satellites telescopes from steadily gazing at their astronomical targets. Swift conducted its final observation on Oct. 20. It is expected to []
NASAs Neil Gehrels Swift Observatory has ended its science mission now that the spacecraft is orbiting less than 171 miles (275 kilometers) above Earths surface. The greater atmospheric drag at this height prevents the satellites telescopes from steadily gazing at their astronomical targets. Swift conducted its final observation on Oct. 20. It is expected to []
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