What Makes a Planet?

December 3, 2016
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Xploration Outer Space - S3 - E11

What Makes a Planet?

We’ll explain why Pluto is no longer considered a planet, and why some scientists believe there is another planet in our solar system that hasn’t been discovered yet. Host Emily Calandrelli looks at many objects that, regardless of definition, look like new and fascinating planets.

Xploration Outer Space: Season 3 - 13 Episode s