Newfound comet likely an ‘interstellar visitor,’ scientists say

A newly discovered comet hurtling toward the orbit of Mars has scientists scurrying to confirm whether it came from outside the solar system, a likely prospect that would make it the second such interstellar object observed in our planetary neighborhood.

The trajectory of the comet, first detected by Crimean astronomer Gennady Borisov, follows a highly curved path barreling in the sun’s direction at unusually high speeds, evidence that it originated beyond the solar system.

“On our team we’ve been scrambling here at the University of Hawaii to get observations to make position measurements,” said Karen Meech, an astronomer at the university whose team concluded that the object’s size and tail of gas classify it as a comet.

“Every time a new comet is discovered, everybody starts to try and get data so that you can get the orbit,” Meech told Reuters, adding that her researchers “all are 100% convinced that this really, truly is interstellar.”

The comet, an apparent amalgam of ice and dust, is expected to make its closest approach to the sun on Dec. 8, putting it 190 million miles (300 million km) from Earth, on a route believed unique to such objects of interstellar origin.

Once confirmed interstellar, the comet – dubbed C/2019 Q4 by astronomers – would become only the second such body ever observed by scientists.

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