John Spencer is a New Horizons science team member at the Johns Hopkins University Applied Physics Laboratory.
March 31, 2008 • 0:28:52
Flying Through the Geysers of Enceladus
February 03, 2010
NASA has just announced that once Cassini's Equinox Mission runs out in June of this year, they will extend it a further seven more years, long enough for the spacecraft to see Saturn through its solstice!!
June 09, 2009
Mysteries, Small and Large
June 08, 2009
Taking a look at Jupiter's moon, Io, from Hawaii.
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