Sept. 22, day and night will be nearly equal in length as Earth spins side-on to the sun and autumn officially begins in the ...

An explosion in space so massive you'll be able to look up and see it in the night sky without a telescope could happen "any ...

The historic SpaceX astronaut mission — which conducted the first-ever private spacewalk, among other achievements —returned ...

This year's Southwest Astronomy Festival will be hosted in and around Cedar Breaks National Monument in Iron County, UT.