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The Solar System

In the Solar System Channel, you can explore the planets and celestial objects around our own sun. Learn about topics such as Mars, Jupiter and the Moon.

How Asteroid Belts Work

Asteroid belts may tell us how our very solar system came into existence. Learn all about asteroid belts, from their characteristics to what they can teach us. See more »

How the Moon Works

The moon is the Earth's only natural satellite and the closest celestial object. Learn about the moon and some of the theories about the moon's origin. See more »

How did a meteor make hundreds of people sick?

A meteor strike in Peru may have made up to 600 people sick, according to recent reports. Find out if the meteor strike in Peru is what made people sick. See more »

10 Memorable Meteor Crashes

Hundred of meteors fly across the sky every night, but only a few make it to Earth. Learn about 10 memorable meteor crashes that left an impression. See more »

How Solar Eclipses Work

Solar eclipses are rare and amazing phenomena. Learn about what happens in a solar eclipse and how to observe one safely. See more »

Why is Pluto no longer considered a planet?

On Aug. 24, 2006, the International Astronomical Union (IAU), an organization of professional astronomers, passed two resolutions that collectively revoked Pluto's planetary status. See more »

Where did the moon come from?

The origin of the moon is explained in this article. Learn about the origin of the moon. See more »

Our Amazing Solar System

Our solar system has a variety of small objects such as asteroids, comets, stars, meteors, and moons. Find out how they affect life on Earth. See more »

Jupiter Explained

Jupiter is the largest planet and is fifth from the sun. It is the third-brightest spot in our skies--after the sun and Venus. Jupiter is made up almost entirely of gas, which means it doesn't have a solid surface like Earth does. See more »

The smallest and most-distant planet in our solar system is tiny, icy Pluto. It is even smaller than our moon, and wasn't discovered until 1930 — the only planet discovered in the twentieth century. See more »