This video shows the orbital motions of the planets around the star Gliese 667C. Three of these planets are super-Earths orbiting in the habitable zone where liquid water may exist. The orbit of the planet Mercury in the Solar System is included for scale. As Gliese 667C is fainter and cooler than the Sun the habitable zone is much closer to the star than in the Solar System.
Credit: Rory Barnes/ESO
[ Read the Article: Three Habitable Super-Earths Discovered In Multi-Planetary Star System ]