Whoosh. Boom.

Hey! Welcome to our site on asteroids and comets. Here you can play a physics based asteroid game, learn about how backyard astronomers are contributing to asteroid research, or hit any spot in the world with an asteroid using our Google Earth Impact simulation.

NEO News!

Check out our new app version of the Rubble game!

Where do they come from...

...and where are they going? Comets versus asteroids, the Oort cloud versus the Asteroid Belt.

Loosely bound piles of trouble

Asteroids can be single rocks, or lots of little ones. And it matters if you want to move one.

What are the odds?

How bad would it be? And do you have more important things to worry about?

... and Backyard astronomers

How much can you learn from a dot of light using a backyard telescope?

...FAQs, Links, and More

Other resources from around the web.

Activities and Multimedia

About the site

This site was developed by the Space Science Institute with funding from NASA and the National Science Foundation. Legal

Great Balls of Fire

SSI will be launching a traveling exhibit on asteroids and comets in the summer of 2011. Visit the exhibit site to learn more.

Copyright 2010 Space Science Institute.   |   Drop us a line.