No matter how many times you see them, the northern lights, or aurora borealis—and their Southern Hemisphere equivalent ... sheets of green and red (or sometimes blue and purple) light.

The post Mars Rover Data Shows That The Red Planet’s Northern Hemisphere Was Once Likely Covered By A Massive Ocean first on ...

Skywatchers have been urged to keep an eye on the night's sky as a red alert has been issued ... The forecaster's Northern Hemisphere aurora forecast sys: "A coronal mass ejection (CME) arrived ...