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re: NASA: new solar system , Trappist-1 ,where life may have evolved on 3 planets
Posted on 2/23/17 at 5:49 am to PrimeTime Money
Posted on 2/23/17 at 5:49 am to PrimeTime Money
quote:
They can't see them can they? Are they not too far away?
OK, They don;t actually SEE the planets, but they can see the changes in reflected light when the planets pass in front of their sun, they can also measure the "wobble" of their sun - the gravitational effects of these planets on their sun.
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