2021-09-30

Astronomers measured the width of the largest known comet close to the solar system: about 150 kilometers

By yqqlm yqqlm

Astronomers measured the width of the largest known comet close to the solar system: about 150 kilometers </ P >

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p > although the brightness of comet BB shows that it is large, at least 100 kilometers wide, how big it is is is still very vague. This is mainly because it was observed at a distance of 29 astronomical units (AU) – almost as far as Neptune – which is the largest distance of a comet found so far</ p>

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p > now, further observation has reduced its size more accurately. A new analysis led by bernardinelli and Bernstein himself found that the comet core was about 150 kilometers wide according to its brightness. If so, this makes it the largest comet ever found, with a considerable range. Most comets are only thousands to tens of thousands of meters wide, while some especially large comets, such as Hale BOPP, may be as wide as 80 kilometers. The previous record holder, sarabat’s comet of 1729, is estimated to be about 100 kilometers wide</ p>

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p > in addition, the research team can calculate the orbit of comet BB in more detail. This object is on an incredibly long round trip to the solar system – in its farthest place, about 1.5 million years ago, it was about 40400 Au away. The last time it swayed near our earth was about 3.5 million years ago, when it was within 18 Au of the sun</ p>

Astronomers measured the width of the largest known comet close to the solar system: about 150 kilometers(1) </ P >

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p > but its current inward journey will be its closest so far. Astronomers have calculated that by 2031, comet BB will peak at 10.9au, almost reaching the orbit of Saturn</ p>

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p > although it is very weak, the comet and tail of this comet have also been detected and studied. New data show that carbon dioxide or ammonia is vaporizing from its surface according to simple sublimation thermodynamics</ p>

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p > other scientists have detected gas bursts from comets. Another team at the Las Cumbres Observatory reported that it brightened significantly in the hours of September 9</ p>

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p > although it is difficult to accurately predict what will happen in the future, new research says it may become brighter than previously thought – up to level 9, or darker than Saturn’s moon Titan. It was initially expected to only become as bright as Pluto. However, if a shell of water ice is formed, it may eventually become darker</ p>

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p > regardless of the results, comet BB will undoubtedly become an attractive observation target in the next decade and beyond</ p>