In contrast, Gliese 12 is an unusually inactive red dwarf, meaning its planets face much less harmful conditions. What makes Gliese 12 b particularly intriguing is its size and location.

NASA has discovered a new world, named Gliese 12 b. It is roughly the size of Earth, lies in the habitable zone, and orbits every 12.8 days.

Over the next few years, Gliese is going to become a household name. Ceres, the dwarf planet that lives in the asteroid belt between Mars and Jupiter, is being photographed up close for the first ...