Seven Earth-sized planets orbit nearby supercool star
Three planets’ paths put them in TRAPPIST-1’s habitable zone
![illustration of a seven planet solar system](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/02/022217_ay_7-planet_main1_free.jpg?fit=860%2C460&ssl=1)
PLANETARY LINEUP Seven Earth-sized planets orbit the star TRAPPIST-1 with short periods, from 1.5 to 20 Earth days. This artist’s illustration shows potential differences in the planets’ surfaces and sizes.
JPL-Caltech/NASA