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TOI 700 d, the outermost known planet in the system, is the really intriguing one. It's just 20% larger than Earth and completes one orbit every 37 days. The alien world receives 86% of the stellar energy that Earth gets from the sun, putting TOI 700 d in the habitable zone (at least as it's traditionally defined), discovery team members said.
All three planets may be tidally locked to TOI 700, always showing it the same face just as Earth's moon only ever shows us its near side. But tidal locking doesn't necessarily preclude the possibility of life on an alien world, astronomers say. And there's more good news along these lines regarding TOI 700.
"In 11 months of data, we saw no flares from the star, which improves the chances TOI 700 d is habitable and makes it easier to model its atmospheric and surface conditions," discovery team leader Emily Gilbert, a graduate student at the University of Chicago, said in the same statement.
originally posted by: glend
a reply to: SimpleIdea
"From our puny perspective in the scheme of things, our wonderful blue sphere is the only one we know in the universe that has life. Personally, I doubt that is going to change for a long time."
They should be able to detect the chemical composition of planets atmosphere within the next 10 years ( Webb telescope, European ELT etc) which should tell us which planets are likely to harbor life. If they detect O2 in the atmosphere of an exo planet it be a very positive bio-signature.
Then I guess, SETI could concentrate their radio telescopes at those planets for radio signals.