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CFBDSIR 2149-0403: A mystery lurks 1800 trillion kilometers from Earth

21 Mar 2017, 12:45 UTC
CFBDSIR 2149-0403: A mystery lurks 1800 trillion kilometers from Earth ESO/L. Cal├žada/P. Delorme/R. Saito/VVV Consortium
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The name is clunky, but the object is mysterious. When it was discovered in 2012, it looked very much like it was a rogue planet, literally a planetary-mass body freely floating in space, not orbiting a star. Other rogue planets have been discovered, but not many, and this one was close enough to Earth that observing it over time could reveal quite a bit about it.

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