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 smaller than comet BB.
from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/11/211129172802.htm
from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/11/211129172802.htm
Largest comet ever observed was active at near-record distance
![Largest comet ever observed was active at near-record distance]()
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November 30, 2021
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