Largest comet ever observed bumps Hale-Bopp from pedestal :

The Bernardinelli-Bernstein comet is officially the largest ever observed, according to new measurements.

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United States , America , Pedro Bernardinelli , Emmanuel Lellouch , Gary Bernstein , Dark Energy , University Of Washington , University Of Pennsylvania , Astrophysics Letters , Dark Energy Survey , Oort Cloud , Observatoire De Paris , Atacama Large Millimeter Array , South America , Atacama Array ,