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jan 15, 2005 - Demote Pluto

Description:

Neil Tyson joins with a group of scientist in leading a campaign to demote Pluto to a dwarf planet. Though it was a controversial issue, he explained how it failed to meet the qualifications of a planet. The next year in 2006, the Internation Astronomical Union reclassified Pluto as a dwarf.

Added to timeline:

Neil DeGrasse Tyson

ByHeidi Cahill
6 Dec 2018
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Date:

jan 15, 2005
Now
~ 20 years ago
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