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Date & Time: May 7, 2021- 7:00 PM Pacific Time
Program
"Radio Waves in Planetary Research"
Radio technology has played a major role in astronomy ever since 1933,
when Karl Jansky accidentally discovered that the center of our galaxy
emits broad-spectrum radio noise. In a similar fashion, Arno Penzias and
Robert Wilson accidentally discovered the Cosmic Microwave Background
(proof of the Big Bang) in 1965 while working for Bell Labs. But did you
know that radio is also used extensively in planetary research within
our own solar system? Jupiter and Saturn emit their own radio
signatures, some of which can be detected by amateurs here on Earth.
Large radio observatories like Arecibo (RIP) and Goldstone have used
RADAR to observe every planet from Mercury to Saturn (along with
hundreds of asteroids), often in incredible detail. Spacecraft like
Voyager 1 and 2, Cassini, and Juno contain high-precision oscillators
that enable extremely sensitive Doppler shift measurements from Earth,
allowing the characterization of planetary gravitational fields.
Finally, radio waves passing through planetary atmospheres and ring
systems allow us to determine their internal structure and even,
potentially, the age of Saturn's rings. In this talk we will give an
overview of some of the more fascinating uses for radio waves in
planetary research and discuss the dramatic results that could not have
been found any other way.
Rob French (AC6GO) is a planetary researcher at the SETI Institute in Mountain View, CA. He uses images from Voyager, Cassini, and the Hubble
Space Telescope to investigate the origin and evolution of the rings and
moons of the outer planets. He recently co-authored a book chapter on
Saturn's dusty F ring and was the co-discoverer of Hippocamp, a small
moon of Neptune. Rob is also deeply involved with NASA's Planetary Data
System, which is tasked with archiving all science data from NASA space
missions for use by future generations. He lives in Sunnyvale, CA with
his wife and three cats (one of which is named for a moon of Jupiter), has been a licensed amateur radio operator for nearly 30 years, and is an avid pilot.
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Meeting ID: 865 2116 2525
