Astronomers Consider Pluto, Increasing Planet Count Astronomers at a meeting of the International Astronomical Union debate a proposal calling for a change in the definition of "planet," which would expand the current number of planets in our solar system to 12. The new definition could potentially expand the planetary count to include dozens more.
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Astronomers Consider Pluto, Increasing Planet Count

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Astronomers Consider Pluto, Increasing Planet Count

Astronomers Consider Pluto, Increasing Planet Count

Astronomers Consider Pluto, Increasing Planet Count

  • Download
  • <iframe src="https://www.npr.org/player/embed/5670908/5670909" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Astronomers at a meeting of the International Astronomical Union debate a proposal calling for a change in the definition of "planet," which would expand the current number of planets in our solar system to 12. The new definition could potentially expand the planetary count to include dozens more.

Guest:

Mike Brown, professor of planetary astronomy, Division of Geological and Planetary Sciences, California Institute of Technology