Seven planets orbit Trappist-1 dwarf star 40 light years away

NASA’s Spitzer Space Telescope has revealed the first known system of seven Earth-size planets around a single star, Trappist-1, which is 40 light years from Earth. Three of these planets are firmly located in the habitable zone, the area around the parent star where a rocky planet is most likely to have liquid water. NASA notes in the video that the images of the planets shown are artist conceptions.