Artist’s impressions of the seven planets in the TRAPPIST-1 system
NASA
One of the most promising systems for searching for life, the search for aliens to communicate between planets has come up empty.
Discovered in 2017, TRAPPIST-1 is a system of seven Earth-sized planets orbiting a red dwarf star, much fainter than the Sun, about 40 light-years away. All of these planets orbit closer to the Sun than Mercury and pass in front of their star from our perspective. Three of the planets orbit the star’s habitable zone, where liquid water can exist. And those are…
