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Astronomers have spotted something in the sky that they’ve never seen before: An asteroid with comet-like tails.
These features “distinguish this object from any other,” scientists write in a paper published the journal Astrophysical Journal Letters.
Asteroids and comets come from the same place — they are both believed to be ancient remains from when our solar system was formed more than 4 billion years ago — but differ based on what they are made of as well as their orbits …. http://www.businessinsider.com