extraterrestrial intelligence are we alone
TRANSCRIPT
Extraterrestrial Intelligence: Are We Alone?
You are all ET “experts” now!
A Fearless Estimate
A Fearless Estimate
A Fearless Estimate
Stellar Evolution
Jupiter’s moons Io, and Europa—way beyond the Habitable Zone
Europa: Water ocean, under the ice crust, melted by internal heat sources— this could be fairly common
Is Europa telling us to expand our definition of Habitable Planet?
A Fearless Estimate
Mars had water seas, but “evidence” for fossil life in Mars rock is unconvincing. We’ll have to explore Mars further
A Fearless Estimate
A Fearless Estimate
A Fearless Estimate
A Fearless Estimate
A Fearless Estimate
A Fearless Estimate
ET Question can only be resolved with more data—who is going to make the first move, us or them?
We’re already on the verge of identifying ‘habitable planets’; Next: Biosignatures might be detected in the atmosphere of a planet many light years away
Our 25 nearest stellar neighbors.
What can they do to contact us?
HOLD ON!! Are we SURE we WANT to be Contacted?
Even George Lucas can’t imagine how strange ETs will really be, and that is mathematical certainty
What can they do to contact us?That requires speculating about them!
If Optimists Correct, Where Are They?
For either possibility 1) or 3), the only sound position is to assume we’re alone for now
Thank You For Viewing This Presentation. For More UFO Content
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