Grapefruit-size fireball from mysterious Oort Cloud may rewrite the historical past of the photo voltaic system

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A stunning fireball that ended its cosmic journey over central Alberta, Canada may change astronomers’ understanding of how the photo voltaic system shaped 4.5 billion years in the past.

Caught on digicam on Feb. 22, 2021, the grapefruit-size rocky meteoroid is assumed to have come from the Oort Cloud, a reservoir of celestial objects that encircles all the photo voltaic system and separates it from interstellar house. Scientists have by no means instantly noticed rocky objects within the Oort Cloud and have lengthy believed that it holds solely icy objects. However the rocky object that wiped out over Canada challenges common theories of the Oort Cloud’s formation, and the early photo voltaic system’s formation typically, in accordance with a research revealed Dec. 12 within the journal Nature Astronomy (opens in new tab).

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