Space: Why does NASA shoot lasers at trees from the International Space Station?

Alejandra Martins BBC News World

Image copyright, NASA, Goddard Space Flight Center

Image caption,

GEDI sends pulses of energy to Earth’s surface 242 times per second.

Right now, a shower of laser pulses from the International Space Station is reaching Earth.

And it aims to reveal the secrets underlying the planet’s forests.

The GEDI mission, jointly developed by NASA’s Goddard Space Flight Center and the University of Maryland, provides unprecedented 3D maps of forested areas in even the most remote locations.

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