In an X (formerly Twitter) post, Pettit shared footage of rare "sprite lightning" illuminating Earth's clouds from below. It's one of only a few times an astronaut has filmed or photographed ...

Colorful sprites, or transient luminous events, flash above clouds in a video taken by NASA astronaut Don Pettit aboard the ISS. | Credit: Don Pettit/NASA NASA astronaut Don Pettit captured ...