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.
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The Ultimate Moon Quiz

Wolves supposedly howl at it, a fairy tale claims a cow once jumped over it and legends say if you look hard enough, there's a man in it. Yes, the moon has a prominent place in popular culture, but there's a lot you might not know about Earth's little orbiting friend. Why doesn't it have soil? Why is its gravity so important? And are we really thinking of going back soon?

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  • Venus (planet)
    Venus (planet)

    Venus, in astronomy, the second planet from the sun. Except for the sun and the moon, Venus is generally the brightest astronomical object in the sky, displaying a brilliant white starlike appearance. See more »

  • What is the Chandler wobble?
    What is the Chandler wobble?

    The Chandler wobble is the change in the spin of the earth on its axis. Think of the wobble you see in a toy top when it first starts spinning or slows down. Its "poles" do not spin in a perfectly straight line. See more »

  • Why does the moon look so much bigger when it is near the horizon?
    Why does the moon look so much bigger when it is near the horizon?

    Why does the moon look so much bigger when it is near the horizon than when it is high up in the sky? This question has been pondered for hundreds if not thousands of years, and is commonly referred to as the moon illusion. See more »

  • Ganymede
    Ganymede

    Ganymede, a satellite of the planet Jupiter. With a diameter of 3,270 miles (5,260 km), Ganymede is the largest satellite in the solar system, and is larger than the planet Mercury. See more »

  • Kuiper Belt
    Kuiper Belt

    Kuiper Belt, a disk-shaped region of space, extending beyond the orbit of Neptune, in which a very large number of minor planets are in orbit around the sun. See more »

  • Sun
    Sun

    Sun, the star at the center of the solar system. Like other stars, the sun is a huge, hot, gaseous sphere. See more »

  • Will Solar Rays Produce Three-Eyed Fish?
    Will Solar Rays Produce Three-Eyed Fish?

    Solar rays and the potential problems they may cause are explained in this article. Learn about solar rays. See more »

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