RE: Why we might be alone in the Universe
May 10, 2019 at 10:15 am
(This post was last modified: May 10, 2019 at 10:27 am by Anomalocaris.)
(May 10, 2019 at 9:43 am)Gawdzilla Sama Wrote:(May 10, 2019 at 9:25 am)Mister Agenda Wrote: It may be that life is common but technological civilizations are vanishingly rare, like one per million galaxies. For now we should act as if we are the galaxy's (or even the universe's) one shot at a star-spanning civilization. If we don't do it, there's a good chance it will never get done. And that would be sad, IMHO.But wouldn't every civilization that reaches our current point have the same chance? Remember, we're a second generation star.
Ours is actually at least a third generation star. It could be of a fourth, fifth, or higher generation, but certainly no less than the third generation. But rocky planets can not form around first generation stars, because the interstellar medium shortly after the Big Bang were devoid of metals. Rocky planets were unlikely to form around second generation stars also because metals were still scarce. Only with third or higher generation stars would one likely find native rocky planets in orbit.
