Originally Posted by
justintime
Yes we do have life on planet earth. We also happen to be the only blue planet in out solar system that supports life.
And there are perhaps
septillions of planets in the universe. 1 septillion inches would be nearly 2,685,000
light years.
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We know there are billion and billions of planets and million of galaxies like our Milky Way.
Sorry, but billions and billions doesn't even come remotely close. And try 80 to 100
billion galaxies, not millions.
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So it is a speculation that with such large numbers the probability of life existing among those billions and billions of planets are quite reasonable.
Yes, a reasonable speculation based on empirical evidence
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That is what the Drake Equation tries to calculate.
Wrong. Sorry, the Drake equation wasn't meant to calculate the number of civilizations in the universe. It was meant to illustrate the effect that the vast number of chances has on the frequency of even highly improbable events. It was meant to show that even if the odds of civilizations arising is extremely small, the number of chances is incomprehensibly large.
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That is what Carl Sagan used to support his search for ETI.
Yes, he and the other SETI scientists considered the vast scale of the universe as a factor that increases the probability of life evolving throughout the universe.
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Today after 50 years of SETI. The number of planets scientist think are capable is reduced to a little over hundred tops.
Please cite a source for this claim.
(By the way, commas are your friends.)
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And even there is could be microbial and not the ETI Carl Sagan envisioned.
Gee, you think microbes (or other simple organisms) will vastly outnumber intelligent, technological life? Image that.
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Please don`t ask for link. I did not save it.
Did you just learn to use the internet last week? Surely you won't have any difficulty plugging something like "number of worlds capable of supporting life" or "only 100 worlds with life" into a search engine, no?
You didn't just make it up, did you?