Contemporary · Europe · Science

2006

Pluto demoted

August 24, 2006

The International Astronomical Union, meeting in Prague, voted to define a planet in a way that excluded Pluto, which became a "dwarf planet." School posters around the world had to be reprinted. Pluto's defenders dressed in mourning. Solar system politics had never produced this much grief in a single afternoon.

In context
Also in 2006 (5 other events on record)
Era

Contemporary (2001–2026), one of 196 events from that era on Saeculum.