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  2. C/2014 UN271 (Bernardinelli–Bernstein) - Wikipedia

    en.wikipedia.org/wiki/C/2014_UN271_(Bernardinelli...

    C/2014 UN 271 is the second-largest known comet, being only behind 95P/Chiron. Radio thermal emission measurements by the Atacama Large Millimeter Array (ALMA) in 2021 estimate a maximum diameter of 137 ± 17 km (85 ± 11 mi) for C/2014 UN 271 's nucleus , assuming negligible contamination of the nucleus's thermal emission by an unseen dust ...

  3. C/1729 P1 (Sarabat) - Wikipedia

    en.wikipedia.org/wiki/C/1729_P1_(Sarabat)

    The Comet of 1729, also known as C/1729 P1 or Comet Sarabat, was an assumed parabolic comet with an absolute magnitude of −3, [2] [4] possibly the brightest ever observed for a comet; [a] it is therefore considered to be potentially the largest comet ever seen. [6]

  4. ‘Mega comet' 60 miles wide is about to fly through the solar ...

    www.aol.com/mega-comet-60-miles-wide-233340354.html

    It is estimated to be between 60 and 230 miles wide, which could make it the largest comet ever discovered, EarthSky said. To put the size in context, Halley's Comet is about 3.5 miles wide, Long ...

  5. NASA spots ‘record-breaking’ comet hurtling toward ... - AOL

    www.aol.com/nasa-spots-record-breaking-comet...

    The space agency said it’s the biggest comet nucleus ever recorded with an estimated diameter of 80 miles and overall bigger than the state of Rhode Island.

  6. Fascinating recent discoveries about comets and meteors in ...

    www.aol.com/fascinating-recent-discoveries...

    As space objects go, comets and meteors are not very big. While a planet like Earth is about 8,000 miles in diameter and a star like our Sun is about 865,000 miles across, the largest asteroid ...

  7. Lists of comets - Wikipedia

    en.wikipedia.org/wiki/Lists_of_comets

    Coin showing Caesar's Comet as a star with eight rays, tail upward. Non-periodic comets are seen only once. They are usually on near-parabolic orbits that will not return to the vicinity of the Sun for thousands of years, if ever.

  8. Halley's Comet Opal - Wikipedia

    en.wikipedia.org/wiki/Halley's_Comet_Opal

    The Halley's Comet Opal is the largest uncut black opal in the world, according to the Guinness Book of World Records. It is so named because it was unearthed in 1986, a year when Halley's Comet could be seen from Earth. It is the third largest gem grade black opal ever recorded, the largest one extant, and the largest specimen ever found in ...

  9. The mega-comet hurtling through our solar system is 85, yes ...

    www.aol.com/mega-comet-hurtling-solar-system...

    Fortunately, it won't come within a billion miles of Earth. Named Comet Bernardinelli-Bernstein, it was perhaps the largest comet ever detected, likely some 10 times larger than the 6-mile-wide ...