Manhattan-sized comet becomes third confirmed interstellar object

At 152,000 miles per hour — fast enough to circle Earth six times in one minute — a massive interstellar comet is passing through our solar system, offering astronomers the first good look at a chunk of another star's leftovers.
'This thing is coming in at such an incredible speed that absolutely nothing in the Solar System could have caused this,' said astronomer Jonti Horner. — Read the rest
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