Why do the northern lights have different colors? The color of the aurora depends on which gas is being excited by the electrons and on how much energy is being exchanged, NASA sa ...

who captured stunning images of the red, green, and yellowish hues. The geomagnetic storm that produced these most recent northern lights is the result of solar winds escaping from a coronal hole ...

Paris is known as the "City of Lights" for its early and extensive ... see another of Don Pettit's stunning Earth images and read about the "overview effect" experienced by astronauts after ...

The pictures received a lot of praise on social media. One user reacted to the India picture and wrote, “We spread out like ...