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‘Oumuamua's incoming and outgoing speed is ~5AU/year. In 10,000 years that's 50,000AU, which is approximately the distance to the outer most region of the Oort
by wahern 6y ago
‘Oumuamua's incoming and outgoing speed is ~5AU/year. In 10,000 years that's 50,000AU, which is approximately the distance to the outer most region of the Oort Cloud: https://en.wikipedia.org/wiki/Oort_cloud https://en.wikipedia.org/wiki/Oort_cloud
- lgl 6y agoI always thought the Oort cloud was a scientifically proven thing but apparently it's "a theoretical cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from 2,000 to 200,000 au (0.03 to 3.2 light-years)"
- messe 6y agoToo faint to be proven with our current instruments.
- divbzero 6y agoThanks for correcting my similar misimpression. It’s curious to note that the proposed outer limit of the Oort cloud (3.2 ly) is more than half the distance to the closest star system (4.4 ly) [1] though I’m unclear whether the cloud would be roughly spherical or have some sort of directionality. [1]: https://en.wikipedia.org/wiki/Alpha_Centauri https://en.wikipedia.org/wiki/Alpha_Centauri