Crab Nebula: NASA's Chandra X-Ray Laboratory released this composite of the Crab Nebula with data from Chandra (blue and white), Hubble (purple), and Spitzer (pink).
Nebulae are gigantic clouds of gas and dust that exist in space between stars. Check out 7 mesmerizing photos of this cosmic ...
Pale Blue Dot: The iconic Valentine's Day photo of Earth turns 35 today — and you're probably in it
On this day 35 years ago, NASA's Voyager 1 spacecraft took a picture that changed how we see our planet. The iconic "Pale Blue Dot" image is just as awe-inspiring today.