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Hunt for Alien Worlds

Program Overview


Are there other planets like Earth? This possibility has engaged people for centuries. Millions of stars fill the universe but, as far as astronomers know, only our Sun is encircled by a planetary system. However, theories about how stars like our Sun formed indicate that planets are a natural by-product, making it likely that other planetary systems exist. Searching for evidence of planets outside our solar system isn't easy. Trying to detect a planet next to a distant star is like trying to spot a firefly next to a flood light. NOVA investigates recent discoveries of planets outside our solar system that could revolutionize theories about planets and the existence of life elsewhere in the universe.

Teacher's Guide
Hunt for Alien Worlds
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