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Private Firms Spy a Market in Spotting Space Junk


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Observatory, Haleakala, Hawaii,

Observatories such as this one in Haleakala, Hawaii, track the movements of satellites and space debris.

Credit: John De Mello/Alamy

The US military has long taken the role of traffic cop in space: monitoring satellites, tracking debris and, in recent years, warning satellite operators and foreign governments of potential collisions and hazards.

From Nature
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