Contrails conjure a sense of something overwhelming and ineffable, as terrifying as it is beautiful.

Southern California will see another cool day before one of the strongest storm systems so far this season moves into the ...

The Universe is full of dust, and a striking new image from the Hubble Space Telescope highlights just how important it is.

To see the northern lights in Colorado, a KP index of 5 or higher is usually needed. The KP index measures geomagnetic ...

The sun is reaching a solar maximum. Here's what that could mean for Iowa and our chances to see the aurora borealis, known ...