Exoplanets in the Trappist-1 system more likely to be habitable than scientists once thought, study suggests

Jun 15, 2021
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Couple considerations that may have been missing here:
- How old is Trappist-1 system? Being Red dwarf, it may have formed during the early epoch of the universe. In this case its metallicity may be too low to form all elements needed for life. However, it does have planetary system suggesting that there are some metals available.
- If Trappist age is many billions of years, then water may have recycled during its lifetime. Initially during hot period it may have been blown away by solar winds, but later formed icy comets on the outskirts of the system that later may have been captured by inner planets, including located in Goldilocke zone.