Up? NASA astronaut Nichole Ayers has shared an incredible image of a sprite, a rare weather phenomenon that's triggered high above the clouds by "intense electrical activity in the thunderstorms below ...

Discover why Earth's farthest distance from the sun coincides with summer heat, then grab your binoculars for a week of ...

A picture snapped from the International Space Station (ISS) by NASA astronaut Nichole Ayers has captured a lesser-seen view ...

On the eve of the 249th anniversary of American independence, NASA on Tuesday showcased a patriotic image of Old Glory as ...