This Day in History: Oct 21

MelRodriguez
Macmillan Employee
Macmillan Employee
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‎10-21-2021 07:09 AM

On Oct 21st, 2003, scientists first discovered the dwarf planet Eris. When first found, there was some discussion that it was larger than Pluto which then led to questions about Pluto's categorization as a planet. The debate within the scientific community ultimately led the International Astronomical Union to "downgrade" Pluto to a dwarf planet in 2006.

The dwarf planet Eris seems to be aptly named as it was inspired by the Greek goddess of discord.                

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About the Author
I am the Marketing Manager for the Bedford/St. Martin's (Macmillan) History list. I've worked at Macmillan since 2008 and have held positions in Sales and Market Development.