2/11 This isn't just any comet—it's a record-breaker.
C/2014 UN271 (Bernardinelli-Bernstein) is about 140 kilometers wide. Most comets are only 1-2 kilometers across.
"It's huge," says astronomer Quanzhi Ye. "It represents a part of the spectrum that we don't understand."
#CometSize #SpaceRecord
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