As far as we know the universe is not infinite, there's actually a place where it ends. While astronomers have never actually seen the edge of the universe, they know it's out there. Theoretical physicist and director of the Institute for Advanced Study at Princeton, Robbert Dijkgraaf explains how scientists know there's an edge of the universe.
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Here's how astronomers study the edge of the universe
You can see it too...with an old TV.
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Following is a transcript of the video:
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