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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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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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NASA wants funding to explore Jupiter’s moon Europa

NASA wants funding to explore Jupiter’s moon Europa

Scientists believe that one of the most likely places in the solar system to harbor life, other than Earth, is one of Jupiter's moons called Europa. Europa is covered by a thick sheet of ice over its surface, but scientists believe that under that ice are oceans of liquid. That subsurface ocean is believed to be kept liquid by tidal flexing.

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NASA releases flock of CubeSat nanosatellites from ISS

NASA releases flock of CubeSat nanosatellites from ISS

NASA has deployed a flock of CubeSat miniature satellites from the International Space Station, sharing an image of the NanoRacks hardware being released from the end of a customized robotic arm. The satellites - each around the size of a loaf of bread - are part of a 33-strong fleet the majority of which will be used by Planet Labs for its project to provide open access to high-resolution imagery of Earth.

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NASA Kepler mission discovers 715 new planets

NASA Kepler mission discovers 715 new planets

NASA's Kepler mission has made an exciting discovery and subsequent announcement: the discovery of 715 new planets orbiting 305 stars. Says the space agency, about 95-percent of the newly discovered planets are smaller than Neptune, making them more or less around the size of Earth, and makes for a "significant increase" in known small planets.

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