Trappist-1 is a newly discovered star that is orbited by seven Earth-like exoplanets.
The planets are huddled closely to the star and all have smaller orbits than Mercury – the closest planet to our Sun.
Because TRAPPIST-1 is a small and ultra-cool dwarf star, the planets have a moderate temperature.
“The star is so small and cold that the seven planets are temperate, which means that they could have some liquid water and maybe life, by extension, on the surface,” said Michaël Gillon, an astrophysicist at the University of Liège in Belgium.
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