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John Spencer

John Spencer

John Spencer

John Spencer is a New Horizons science team member at the Johns Hopkins University Applied Physics Laboratory.

Latest Planetary Radio Appearance

Flying Through the Geysers of Enceladus

March 31, 2008 • 0:28:52

Flying Through the Geysers of Enceladus

Latest Blog Posts

Hooray! Cassini's tour has been extended for SEVEN MORE YEARS!

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!!

Mysteries, Small and Large

June 09, 2009

Mysteries, Small and Large

Aloha, Io

June 08, 2009

Taking a look at Jupiter's moon, Io, from Hawaii.

astronaut on Phobos
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