Largest comet ever observed was active at near-record distance

ScienceDaily
Nov 29, 2021, 5:28 pm162 pts
Astronomers show that comet Bernardinelli-Bernstein (BB), the largest comet ever discovered, was active long before previously thought, meaning the ice within it is vaporizing and forming an envelope of dust and vapor known as a coma. Only one active comet has been observed farther from the sun, and it was much…

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