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Old 04-13-2022, 09:29 AM
 
Location: King County, WA
15,834 posts, read 6,539,575 times
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This comet is 85 miles across!

Hubble Confirms Largest Comet Nucleus Ever Seen (Apr 12, 2022)

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Comet C/2014 UN271 was discovered by astronomers Pedro Bernardinelli and Gary Bernstein in archival images from the Dark Energy Survey at the Cerro Tololo Inter-American Observatory in Chile. It was first serendipitously observed in November 2010, when it was a whopping 3 billion miles from the Sun, which is nearly the average distance to Neptune. Since then, it has been intensively studied by ground and space-based telescopes.

"This is an amazing object, given how active it is when it's still so far from the Sun," said the paper's lead author Man-To Hui of the Macau University of Science and Technology, Taipa, Macau. "We guessed the comet might be pretty big, but we needed the best data to confirm this." So, his team used Hubble to take five photos of the comet on January 8, 2022.
The Hubble telescope confirms the largest comet nucleus ever seen by astronomers

Quote:
...NASA assures that it will never get closer than 1 billion miles away from the sun — and even then, it won't be until 2031.

The previous record holder for largest comet nucleus was discovered in 2002. Comet C/2002 VQ94 was approximately 60 miles across.
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Old 04-13-2022, 11:03 AM
 
Location: Middle America
11,097 posts, read 7,154,662 times
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I'd be much more impressed by a comet that we can see in the sky with our eyes. We're way overdue for another bright and prominent comet. That's what gets our attention, rather than something invisible to us over a billion miles away.
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