so, the trappist-1 system has seven planets-trappist-1b,c,d,e,f,g, and h-and 3 of the planets are in the habitable zone!
The Hubble space telescope as looked at these planets, and we have found no hydrogen in their atmospheres! that’s good because a hydrogen-rich atmosphere could mean that these planets are not gas giants! Hubble observed these planets in December 2016 and found that they were probably not gas giants.
so, trappist-1 b,c,d,e, and f are probably not gas giants, and of those, and of those, e and f are in the habitable “Goldilocks” zone! planet g needs more info, and Hubble has not yet looked at planet h. the system is located approximately 39 light-years away.
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