Wednesday, July 28, 2010

Caltech Astronomer Finds Planets in Unusually Intimate Dance around Dying Star - Caltech Media Relations

Once again, an exoplanet discovery illustrates a far greater variety of planets and planetary configurations than the IAU can imagine. These two giants are in a resonant orbit just like Neptune and Pluto. By definition, that means neither "clears its orbit" so neither would be considered a planet according to the IAU definition.

This is just more evidence that we need a broader rather than a narrower definition of the term planet.

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