Video: What is a Sungrazing Comet? - NASA Science
nasa.gov
Video: What is a Sungrazing Comet? - NASA Science
(Grades K-12 ) A brief video (~3 minutes) discussing "sungrazer" comets, including example footage from past observations by spacecraft. Sungrazing comets come very close to the sun at their nearest approach, a point called perihelion
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掠日彗星的意义
【末日預言】宇宙天體真的會影響人類命運嗎？揭開3000年彗星災難預言的科學真相！彗星帶來厄運只是迷信？惡魔之星還是普通天體？從X行星到3I/Atlas：一次看懂蘇美爾古文明預言與天文學！【上帝的信徒】
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What is a Sungrazing Comet? 9.5.2020 • Sungrazing comets are a special class of comets that come very close to the sun at their nearest approach, a point called perihelion. To be considered a sungrazer, a comet needs to get within about 850,000 miles from the sun at perihelion. Many come even closer, even to within a few thousand miles. Being so close to the sun is very hard on comets for many reasons. They are subjected to a lot of solar radiation which boils off their water or other volatiles.
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