The area near clouds is often classified as ‘clear sky’, but a new study demonstrates the potential biases of misclassifying ...

A recent video created from images captured by Curiosity shows clouds tinted red and green flowing though the sky over Mars.

For example, here’s an image from April 8 last year (above), that confounds all expectations—with clouds over Texas and a clear sky for almost all the rest of the path of totality. Anderson ...

The multi-colored clouds are known as polar stratospheric clouds (PSCs) and look similar to auroras blazing in the sky. However, these rainbow clouds aren’t auroras as you might think.