A Collaborative National Center for Fusion & Plasma Research
April 29, 2015,
4:00pm to 5:30pm

MBG Auditorium

COLLOQUIUM: Worlds Seen for the First Time - Ceres and Pluto

Dr. James Green

This year, planetary spacecraft will visit two significant bodies in the solar system. These bodies are the dwarf planets Ceres and Pluto. Ceres was first discovered in 1801 and thought to be a planet. It was only realized 50 years later that Ceres was a member of a huge number of objects in what we now know as the asteroid belt. The Dawn spacecraft was just captured into orbit around the dwarf planet Ceres. After spending more than a year at another asteroid called Vesta and spending 2.5 years finally getting to Ceres. We know almost nothing about Ceres and the new images that are being sent back are showing a fascinating world, from heavily cratered regions, to large smooth plains, and a number of mysterious bright spots that have not been resolved yet. Dawn will continue to spiral down, staying in certain orbits, until reaching an altitude of ~475 km. Ceres is about to reveal it’s secrets. In mid-July another spacecraft, named New Horizons, will fly through the Pluto system revealing another dwarf planet and its five moons. Pluto was discovered in 1930 and is the largest member of the region where thousands of other similar bodies exist beyond the orbit of Neptune. We call that region the Kuiper Belt. We know so very little about Pluto and its moons. We also hope to be able to compare Pluto and Ceres to see how these two bodies might be related. This is indeed a fascinating time for planetary science.

Colloquium Committee: 

The Princeton Plasma Physics Laboratory 2017-2018 Colloquium Committee is comprised of the following people. Please feel free to contact them by e-mail regarding any possible speakers or topics for future colloquia.

Carol Ann Austin, caustin@pppl.gov
Nathaniel Ferraro, nferraro@pppl.gov
Charles A Gentile, cgentile@pppl.gov
Masayuki Ono, mono@pppl.gov
Tori Sikkema, tsikkema@pppl.gov

  • Carol Ann Austin 609-243-2484

U.S. Department of Energy
Princeton Plasma Physics Laboratory is a U.S. Department of Energy national laboratory managed by Princeton University.

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