Christopher Bouzy
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There are 100 - 400 billion stars in each galaxy, with at least one planet orbiting each star. There are 100 billion galaxies in the universe. That means there are trillions of planets in the universe, so yes, there is life on other planets.
08:50 AM - Jul 01, 2023
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Alice Haugen
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Scientist here: not every star has a planet. Not every galaxy is habitable (movements in globulars = too many close encounters). In spirals most stars have no habitable planets (too close, too much radiation, too far, not enough heavier elements). Red dwarfs may be bad. Still a lot of possibles.
In response to Christopher Bouzy.
09:03 AM - Jul 01, 2023
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Tony_Bell
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In response to Alice Haugen.
Don't several of your remarks presuppose that the lifeforms surmised about be ones substantively like ours & thus not viable in environments materially different from ours?
09:36 AM - Jul 01, 2023
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Ken Jones 🐬
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In response to Tony_Bell.
This spout was removed because the account associated with it was suspended.
10:30 AM - Jul 01, 2023
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Alice Haugen
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In response to Tony_Bell.
Hi, professor of biochemistry here.
life on Earth uses carbon, oxygen, nitrogen whose physical properties make them uniquely adept at forming molecules. Silicon isn't a good alternative. The variety of silicon molecules in dust in space is something like 1% of the variety that carbon can make.
11:25 AM - Jul 02, 2023
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