- Aug. 24, 2006: Pluto is demoted Astronomy Magazine
- Why is Pluto no longer a planet? These are the International Astronomical Union’s classification criteria MARCA
- Within Two Years, Which Year Was Pluto Downgraded To Dwarf Planet Status? 102.9 The Buzz
- Stargazing: Pluto isn’t the only astral landmark that was stripped of its planet title Pittsburgh Post-Gazette