Three of them may be habitable NASA/JPL-Caltech Seven Earth-size exoplanets orbit the star TRAPPIST-1. Three orbit very close to the star and may be too hot to sustain liquid water on the surface; one may be too cold. But the three planets in the middle may be juuuust right. Planet-hunters are always on the lookout for… Continue reading A whopping seven Earth-size planets were just found orbiting a nearby star →