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Set the planets in motion with a flick of your wrist! Build a mechanical model of the solar system including the sun and eight planets (also known ...

KA-BOOOOM! The Universe began about 15 billion years ago with a tremendous explosion called the "Big Bang." We've captured a miniature Big Bang exp...

Have you ever seen a close-up photograph of the Moon, with its fascinating cratered landscape? With this telescope, you can investigate the moon’s ...