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What part of a space rock survives all the way to the ground?


Still Waters
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Posted (IP: Staff) ·

When a small asteroid enters Earth's atmosphere from space, its surface is brutally heated, causing melting and fragmenting. Therefore, why the rocks near the surface survive to the ground as meteorites has been somewhat of a mystery. That mystery is solved in a new study of the fiery entry of asteroid 2008 TC3, published online today in Meteoritics and Planetary Science.

https://onlinelibrary.wiley.com/doi/10.1111/maps.13892

"Most of our meteorites fall from rocks the size of grapefruits to small cars," says lead author and meteor astronomer Peter Jenniskens of the SETI Institute and NASA Ames Research Center. "Rocks that big do not spin fast enough to spread the heat during the brief meteor phase, and we now have evidence that the backside survives to the ground."

https://phys.org/news/2022-08-space-survives-ground.html

Related:

https://www.unexplained-mysteries.com/forum/topic/342442-evidence-for-a-previously-unknown-asteroid/

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