University of Hawaii astronomer Fabrizio Bernardi came here from Italy to look for potentially dangerous asteroids.

"But, of course, we see other objects -- stars and comets. This time, the first time, I saw a new comet," the postdoctoral researcher said.

Bernardi was looking at images taken with the Canada-France-Hawaii Telescope on Mauna Kea when he noticed an object that was "a bit fuzzy," with a tail estimated at more than 13,000 miles long.