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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In response to Christopher Bouzy.
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.
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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Tony_Bell
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I realize that was her point.

My point is that insofar as our exposure, relative to the universe's vastness & potential for variety, to life is very, very limited, consisting of exactly one example, her assertion is premature.

Indeed, we mayn't have found every lifeform that exists on Eartn
In response to Ken Jones 🐬.
02:22 PM - Jul 01, 2023
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Alice Haugen
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In response to Tony_Bell.
As I said, we can assess the versatility of other elements by seeing how many molecules are found in space dust. The laws of physics are the same everywhere so the chemistry underlying potential life is also universal.
02:07 PM - Jul 02, 2023
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Tony_Bell
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In response to Alice Haugen.
I'm sure the laws of physics & chemistry are universal. I'm not sure those laws have not been availed to form life in ways we've neither seen nor imagined.

But, yes, to the extent "life" means "life as we know it*, sure she's right.
09:23 AM - Jul 03, 2023
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