The discovery of Pluto in 1930 Clyde Tombaugh.

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Presentation transcript:

The discovery of Pluto in 1930 Clyde Tombaugh

Blink-comparator that Tombaugh used to compare two images, and discover Pluto by it’s motion

The discovery of Pluto’s moon Charon in 1978 James Christy & Robert Harrington U.S. Naval Observatory Washington, D.C.

The discovery of two new moons of Pluto Weaver, Stern, Mutchler, Steffl, Merline, Buie, Spencer, Young, Young, 2006, Nature, 439

Notice the star trails, cosmic rays, chip gap… 15 May 2005, frame 1

Notice the star trails, cosmic rays, chip gap… 15 May 2005, frame 2

Dithering across the chip gap now…see anything? 15 May 2005, frame 3

Dithering across the chip gap now…see anything? 15 May 2005, frame 4

Looking for real objects among all the artifacts… 15 May 2005, sum 4 frames

Hydra Nix Charon Pluto Hubble ACS image on 15 May 2005

Hydra Nix Charon Pluto Hubble ACS image on 18 May 2005

New moons are roughly 3-4x farther out than Charon, and co-planar with possible 6:4:1 orbital resonances Hydra (P1) Charon Nix (P2) 15 and 18 May 2005, median 8 frames

What does a “quadruple planet” look like? http://www.stsci.edu/~mutchler/pluto_50.html Animations produced with Celestia

New Horizons launch 19 January 2006 Annette and Patsy Tombaugh Jim Christy Jim Christy

Dawn New Horizons http://pluto.jhuapl.edu http://www.dawn-mission.org Pluto 2015 Ceres 2015 Vesta 2011 http://www.dawn-mission.org http://pluto.jhuapl.edu

In memory of Clyde W. Tombaugh, the American astronomer who discovered Pluto in 1930, NASA's New Horizons spacecraft carries a small aluminum canister containing some of Tombaugh's cremated remains, donated by his family. These remains will fly past Pluto with New Horizons on July 14, 2015, and then on past Kuiper Belt objects in the succeeding years. The memorial canister, about two inches wide and half-an-inch tall, is attached to the inside, upper deck of the spacecraft. Its inscription reads: Interned herein are remains of American Clyde W. Tombaugh, discoverer of Pluto and the solar system's "third zone." Adelle and Muron's boy, Patricia's husband, Annette and Alden's father, astronomer, teacher, punster, and friend: Clyde W. Tombaugh (1906-1997)

First astronomy book I ever read