Walkabout the Galaxy
radioisotopes; meteorites; pebble accretion
Astrophysics and Astronomy | Physics
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.
Josephson junctions, what's your function?
Hooking up superconductors to each other?
Josephson Junction, what's your function?
I've got three different types for you to choose from.
Josephson Junction, how do you function?
Quantum mechanics let Cooper pairs Travel.
Josephson junction, what are you good for?
The international standard for a volt, and much more may be replacing CCD's to look far.
Josephson junctions bringing the quantum realm to your realm since 1962. Josephson junctions, heroes don't get any bigger (Ant-Man).
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "Earth's Pebble Accretion and the Boring Billion" (2023). Walkabout the Galaxy Podcast. 245.