Overview
When the International Astronomical Union (IAU) met on August 24, 2006, astronomers voted to reclassify Pluto from a planet to a dwarf planet. Explore the new definition of a planet and the downsizing of the solar system to eight “true” planets — changes that have sparked public debate as well as new understandings of the evolving nature of science. Learn too why Pluto has been at the center of controversy ever since it was first recognized in 1930. As technology advanced, Pluto’s position in the scientific community declined.
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