Episode Title
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Series Title
Walkabout the Galaxy
Keywords
radioisotopes; meteorites; pebble accretion
Disciplines
Astrophysics and Astronomy | Physics
Description
New analysis of radioisotopes of meteorites and the Earth suggest the Earth formed in only a few million years via a process called pebble accretion. This may mean the Earth’s water was incorporated early and gradually rather than through late impacts. Recent determinations of the historical length of the Earth’s day suggest it stalled out at 19 hours for a cool billion years, and we still have a ways to go to get to 25 hours when we can all sleep in. Find out about the Earth’s history, supermassive black hole mergers, and syzygy trivia.
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Date Created
6-21-2023
Item Type
Podcast
Type
article
Recommended Citation
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "Earth's Pebble Accretion and the Boring Billion" (2023). Walkabout the Galaxy Podcast. 245.
https://stars.library.ucf.edu/walkaboutthegalaxy/245
