It uses several laser emitters to create what's called pseudothermal illumination. These laser beams are sent toward the spy's target, and two telescopes record their reflected intensity.

Astronomers have revealed that a Chinese satellite fired green laser beams over the state of Hawaii – at a time when tensions are boiling over between Beijing and Washington after several ...

Astronomers have revealed that a Chinese satellite fired green laser beams over the state of Hawaii – at a time when tensions are boiling over between Beijing and Washington after several ...