Important Years for Pluto

Discoveries

Pluto discovered by Clyde Tombaugh

1930

first trans-Neptunian objects discovered by David Jewitt and Jane Luu

1992

Eris (Larger than Pluto) discovered

2003

Pluto's Fourth Moon Discovered

2011

Pluto's Fifth Moon Discovered

2012

Technologies

Hubble Space Telescope Lauched

1990

Hubble Space Telescope Repaired

1994

New Horizons space probe launched

2006

New Horizons space probe closest approach to Pluto

2015

Science Rules

Rules of Planets approved

2006