RE: Aliens - Are they out there? Have they visited us? And related questions
December 15, 2010 at 6:48 pm
I would go as far as to say that it is as certain as anything that is not logically necessary.
400,000,000,000 stars in the galaxy
100,000,000,000 known galaxies
That's 40,000,000,000,000,000,000,000 stars
If half have planets and planet-bearing stars have an estimated 3 stars average (not much data on that one)
That's 60,000,000,000,000,000,000,000 Planets
Even if 1/10 are in the goldilocks zone.
That's 6,000,000,000,000,000,000,000 planets in the goldilocks zone.
If only 1% of those have the conditions necessary for life
That's 60,000,000,000,000,000,000 planets where abiogenesis can happen
They are pretty fucking conservative estimates compared to the likes of the drake equation too.
400,000,000,000 stars in the galaxy
100,000,000,000 known galaxies
That's 40,000,000,000,000,000,000,000 stars
If half have planets and planet-bearing stars have an estimated 3 stars average (not much data on that one)
That's 60,000,000,000,000,000,000,000 Planets
Even if 1/10 are in the goldilocks zone.
That's 6,000,000,000,000,000,000,000 planets in the goldilocks zone.
If only 1% of those have the conditions necessary for life
That's 60,000,000,000,000,000,000 planets where abiogenesis can happen
They are pretty fucking conservative estimates compared to the likes of the drake equation too.
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