NASA recently discovered a planetary system orbiting a small star that's home to at least 7 rocky, roughly Earth-sized planets.
These planets have a number of remarkable characteristics. For example:
- Every single one of these planets, under the right conditions, could potentially have liquid water.
- They're so close together that it would be possible to see other planets clearly in the sky if you were standing on the surface of one.
- At least 3 of the planets are located in the star's "habitable zone."