Danish Astronomer Tycho Brahe's observations of the Great Comet of 1577 overturn 1,500 years of scientific belief when he uses them to prove that planets do not orbit inside concentric crystalline spheres.
Discover how centuries of knowledge, experimentation and engineering helped our ancestors understand the mysteries of space. Expert contributors decode astronomical myths and uncover the science behind their origins.
Dozens of your favorite THIRTEEN and PBS programs are available to watch on-demand on many popular platforms.
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