The Half Earth Catalog

Oh, that planet of ours.

On Feb. 11, 2015, a SpaceX Falcon 9 rocket launched with the Deep Space Climate Observatory, or DSCOVR, on board. The sat was slowly eased into an orbit 1.5 million kilometers (just under a million miles) away from Earth and toward the Sun, into a gravitational soft spot called the L1 point. There, the gravity of the Earth and Sun balance (if you account for the Earth’s centrifugal force as it moves around the Sun too).

Safely ensconced at this height, DSCOVR...

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