Asteroid 2012 TC4 hasn't been seen since its last brush with our planet five years ago, but calculations of its trajectory told astronomers that it would return in October 2017. Right on cue, the building-sized space rock has now emerged from the darkness of space, as it hurtles towards the Earth. NASA and the ESA plan to use it as a test run for the international Planetary Defense network, and have now been able to calculate its trajectory.
.. Continue Reading Space agencies track trajectory of approaching asteroidCategory: Space
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from New Atlas http://ift.tt/2uTYtyN
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