Comet 2I/Borisov is only the second interstellar object known to have passed through our solar system. In this observation by the Hubble Space Telescope, the comet is seen shortly after its closest approach to the sun.

Comet 2I/Borisov, only the second interstellar object ever spotted in our solar system, is racing through our celestial neighborhood at the “breathtaking” speed of 110,000 mph.

As it zoomed close to our sun earlier this week, the Hubble Space Telescope snapped a shot of the comet, which is an ancient ball of ice, rock and dust that formed in a distant star system.

Scientists are “clamoring” to study this frozen time capsule, NASA said, looking for clues as to what may lie beyond our solar system.

“Data from the Hubble Space Telescope give us the best measure of the size of comet 2I/Borisov’s nucleus, which is the really important part of the comet,” said David Jewitt, a UCLA professor of planetary science and astronomy who analyzed and interpreted data from the new image.

“Surprisingly, our Hubble images show that its nucleus is more than 15 times smaller than earlier investigations suggested it might be, Jewitt said, adding that its diameter is only about 6/10 of a mile. 



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