CAPE CANAVERAL, Fla. — The Hubble Space Telescope has captured the best picture yet of a high-speed

NASA and the European Space Agency released the latest photos Thursday.

Discovered last month by a telescope in Chile, the is only the third known to pass our way and poses no threat to Earth.

“No one knows where the comet came from. It’s like glimpsing a rifle bullet for a thousandth of a second. You can't project that back with any accuracy to figure out where it started on its path,” said David Jewitt of the University of California, Los Angeles, science team leader for the

Astronomers originally estimated the size of its icy core at several miles (tens of kilometers) across, but Hubble’s observations have narrowed it down to no more than 3.5 miles (5.6 kilometers). It could even be a

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