The Decision to Classify Pluto as a Dwarf Planet Was

question 16

Multiple Choice

The decision to classify Pluto as a dwarf planet was made by:

• A) its discoverer Clyde Tombaugh in 1930
• B) the president of the U.S. Naval Observatory in 2001
• C) the International Astronomical Union in 2006
• D) the Secretary General of the United Nations in 2001
• E) a vote of the majority of Americans in 2006