An artist’s concept shows the TRAPPIST-1 planetary system, with its seven Earth-sized, temperate exoplanets orbiting an ultra-cool dwarf star. It’s unusual to have so many planets in the habitable zone.
NASA/JPL/Caltec
https://astronomy.com/news/2020/11/why-havent-we-found-alien-life-yet-blame-our-closed-minds