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re: NASA: new solar system , Trappist-1 ,where life may have evolved on 3 planets
Posted on 2/22/17 at 8:38 pm to ThinePreparedAni
Posted on 2/22/17 at 8:38 pm to ThinePreparedAni
quote:
Life may have evolved on at least three planets within a newly discovered solar system that is 39 light years from Earth, it was announced last night.
Astronomers have made huge leaps in extra-solar planet hunting in the past 20 years. Even as recently as the 1990's, it was pretty much consensus that earth was special and that the vast majority of stars did not have planetary systems. Now they have found thousands of such planets and it is clear that stars without planets are rare (not the other way around).
Theoretically life can be detected with certain chemical signatures given off in the planet's atmosphere, but I doubt that will convince everyone. I am not sure biologists agree on what those signatures will be.
1
Posted on 2/22/17 at 8:40 pm to AUstar
It's pretty much a statistical impossibility that Earth is the only place in the universe containing life.
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