The Hubble telescope confirms the largest comet nucleus ever seen by astronomers
NASA's Hubble Space Telescope has confirmed the largest icy comet nucleus ever seen by scientists. The C/2014 UN271 (Bernardinelli-Bernstein) nucleus is about 80 miles in diameter, which is larger than the state of Rhode Island, NASA says.
The comet's nucleus is about 50 times larger than most comets and its mass is estimated to be a staggering 500 trillion tons.
"This comet is literally the tip of the iceberg for many thousands of comets that are too faint to see in the more distant parts of the solar system," David Jewitt, a professor of planetary science and astronomy at the University of California, Los Angeles, said in a statement.
"We've always suspected this comet had to be big because it is so bright at such a large distance. Now we confirm it is," Jewitt added.
https://www.npr.org/2022/04/13/1092535922/hubble-telescope-comet-biggest-nasa