But few are fortunate enough to see Kelvin-Helmholtz clouds, which look like a pattern of ocean waves in the sky. Kelvin-Helmholtz clouds, also known as fluctus clouds, is a rare phenomenon that's ...

The universe is huge, yet astronomers have looked at a few parts of the night sky over and over again ... beyond—have looked at the Magellanic Clouds, two mini-galaxies in our celestial ...