Physics Department Seminar University of Alaska Fairbanks


J O U R N A L    C L U B

 

New Horizons mission to Pluto:
An overview of initial results

 
by
 
Peter Delamere
Physics Department and GI, UAF

 

ABSTRACT

The New Horizons spacecraft completed the closest approach phase of its flyby of Pluto in July 2015. This unique mission is poised to answer unresolved questions about Pluto, its escaping atmosphere, and the elusive Kuiper belt of icy objects. A steady stream (3 kb/s) of data from this incredible mission will continue for several months, but already the initial results reveal dramatic topology (stereo images will be shown!) and a hazy atmosphere. While the speaker is not an expert in planetary geology, an honest attempt will be made to share some of New Horizons' discoveries — from nitrogen ponds and rivers, to glaciers. In addition, the detailed solar occultation (vs. the attention-grabbing stellar occultation in 1988) of Pluto’s atmosphere has revealed a much colder atmosphere, significantly reducing the expected scale heights and escape rates. The interaction of the solar wind with Pluto’s escaping atmosphere is therefore correspondingly reduced from initial expectations. While plasma data will not be presented, model results of the solar wind interaction based on the latest atmospheric models will be discussed.



 

Friday, 11 December 2015

Globe Room, Elvey Building

3:45 PM