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Asteroids in the Solar System - Windows to the Universe

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Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.

Asteroids

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Last modified November 28, 2007 by Randy Russell.

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Traveling Nitrogen Classroom Activity Kit

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New planetoid named Sedna discovered

Astronomers have found a new object in our Solar System. The new object is named Sedna. Astronomers are calling Sedna a "planetoid". A planetoid is smaller than a planet but bigger than asteroids or comets....more

Asteroid Toutatis Passes Near Earth

A big asteroid flew by Earth. Don't worry though - it isn't going to hit us! The asteroid is named Toutatis. It didn't get too close to Earth. The closest Toutatis came to Earth was 1.5 million kilometers...more

Pluto demoted - no longer a Planet!

Pluto has been officially demoted from its status as a planet. The International Astronomical Union (IAU), at a meeting in August 2006, voted on their first "official" definition of a planet....more

Meteors

Meteors are streaks of light, usually lasting just a few seconds, which people occasionally see in the night sky. They are sometimes called "shooting stars" or "falling stars", though they are not stars...more

Geminid Meteor Shower

Meteor showers are times when you can see a lot of meteors in one night. There are several different meteor showers. Each meteor shower happens at the same time every year. There is a meteor shower in...more

Quadrantid Meteor Shower

Meteor showers are times when you can see a lot of meteors in one night. There are several different meteor showers. Each meteor shower happens at the same time every year. There is a meteor shower in...more

Asteroid Toutatis

Toutatis is the name of a strange asteroid. This asteroid has a strange shape. It also spins in a funny way. Toutatis is shaped like a potato. It is about 5 km (3 miles) long. It is about half as wide...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF