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Tenth Planet?

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Tenth Planet?

Tenth Planet?

Tenth Planet?

  • Download
  • <iframe src="https://www.npr.org/player/embed/4787315/4787316" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Astronomers say they have found a Kuiper belt object bigger than Pluto orbiting our sun. Should it receive planetary status?

Guest:

Michael Brown, professor of planetary astronomy, California Institite of Technology.