NASA

Mercury shrinking NASA confirms: 4.3 miles in 4bn years

Mercury shrinking NASA confirms: 4.3 miles in 4bn years

Mercury is shrinking, its radius reduced as much as 4.3 miles over the past four billion years, scientists have confirmed, with the planet contracting as its iron core cools. The gradual reduction had been expected but unconfirmed until NASA's Messenger spacecraft beamed back photos of Mercury's surface, with previous - incomplete - footage of the closest planet to our sun showing far less shrinkage than the models predicted.

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Crowdsourced Moon maps get accuracy approval

Crowdsourced Moon maps get accuracy approval

Crowdsourcing already gets products off the ground and figures out where traffic congestion is, but CosmoQuest is turning the power of group-work to map the moon. Using high-resolution images beamed back from NASA's Lunar Reconnaissance Orbiter (LRO), the public science project allows anybody to register and then sift through, flagging up craters, boulders, and other features of the rocky surface. Now, new research indicates the crowdsourced mapping can be just as accurate as when trained experts do it.

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NASA WISE survey finds no Planet X beyond Pluto

NASA WISE survey finds no Planet X beyond Pluto

In 2011, a pair of physicists from the University of Louisiana at Lafayette announced that they had completed research that suggested another planet orbiting in a solar system beyond Pluto. The two professors called the theoretical planet Planet X or Tyche. The duo hoped that when NASA completed its WISE or Wide-field Infrared Survey Explorer observations the planet would be confirmed.

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