My research interests are space plasma
physics, outer planet magnetospheres, solar wind in the outer heliosphere, and
astrophysical plasmas. I was Principal Investigator on the Voyager Plasma
Science Experiment during the Voyager Nepture Encounter--the end of the Grand Tour. I am now a Co-Investigator on the Plasma Science
Experiment onboard the Voyager Interstellar Mission.
Voyager 2 crossed the solar wind termination shock in August of 2007 (see figure below). Crossing the heliopause into the interstellar medium is next up, will almost certainly happen some time in the next decade.
I have twice received the NASA Exceptional
Scientific Achievement Medal, once for my contributions to the understanding of
the plasma dynamics of the Jovian magnetosphere, in 1980, and once for my role
as Principal Investigator on the Plasma Science Experiment on Voyager during
encounter, in 1990.