Space

Famous astronomer Carl Sagan attempts to describe what it's like to think about the fourth dimension using the famous Flatland example from author Edwin Abbott in this classic video.

Scientists believe we’ve only discovered about 5% of the universe. Here’s a map of what we’ve found so far, visualized using a log scale.

Each year, Smithsonian scientists collect hundreds of meteorites from Antarctica that reveal details about the origins of Earth and our solar system.

On a dry lakebed in Nevada, a group of friends build the first scale model of the solar system with complete planetary orbits: a true illustration of our planet's humble position in space.

Our world at very small scales is governed by quantum mechanics, in which forces and energy come in discrete packets. At large scales, our world is governed by gravity, which moves the planets and stars and can create waves in spacetime. To merge...

A free, web-based collection of astronomy and Earth science videos and interactives.

Explore an archive of all known exoplanets

Bray Falls is a deep sky photographer out of Phoenix, Arizona, using his own set-ups to capture dazzling images of nearby galaxies and much more. Check out his images here.

The second largest planet in our solar system, adorned with thousands of beautiful ringlets, Saturn is unique among the planets.

Astrophotographers specialize in collecting as much light from celestial objects as possible while minimizing the movement of the object they're capturing. It's a unique skillset—requiring unique tools—but the results are often universally...