Colorful, massive, and mysterious - nebulae are some of the most stunning sights in the universe. But what exactly are they? In this video, we explore the science behind these cosmic clouds, how they ...

Sculptor—officially labeled NGC 253—is considered a starburst galaxy, one heavy with stellar action. It's located 11 million light-years away in the Southern Hemisphere's constellation Sculptor, and ...

NASA astronaut Nichole Ayers captured an electrifying image of a giant lightning "sprite" shooting up over Mexico and ...