The Universe

How big is the universe? Bigger than you could imagine - and getting bigger every day! In this project, you'll experience the expanding universe for yourself.

Asteroids!

Learn about asteroids, the wandering space rocks in our own Solar Sytem, then look through SkyServer to find them. SkyServer has more than 10,000 asteroids for you to find!

Types of Stars

With powerful telescopes, astronomers can see many millions of stars. How can you make sense of so many stars?

In this project, you'll figure out a way of organizing stars into just a few categories, and you'll learn what these categories mean.

Color

Look up at the sky - what do you see?

If you're near a city, you may see a few bright white stars. But you're not really seeing the full story of the sky - stars have colors!

In this project, you'll see stars in beautiful shades of red, blue, and yellow, and you'll learn what causes the color of a star.

Galaxies

Galaxies are huge - hundreds of millions of times bigger than our solar system. But even the nearest ones are so far away they look like tiny, fuzzy spots in the sky.

How do astronomers study things that are so big and so far away? In this project, you'll learn by looking at galaxies yourself.

Scavenger Hunt

NEW!

Look through the SkyServer database to go on a scavenger hunt through the sky!