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Planetary RadioSeptember 27, 2017

Celebrating Cassini…Live!

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On This Episode
Emily Lakdawalla 2017 headshot square serene
Emily Lakdawalla

Solar System Specialist, The Planetary Society

Earl Maize head shot
Earl Maize

Cassini Mission Program Manager, Jet Propulsion Laboratory

Linda Spilker head shot
Linda Spilker

Cassini Project Scientist, Jet Propulsion Laboratory

Julie Webster head shot
Julie Webster

Cassini Spacecraft Operations Office Manager, Jet Propulsion Laboratory

More than 1,100 fans of the just-completed 20-year mission to Saturn joined us for a live tribute. The Planetary Society’s Mat Kaplan and KPCC Science Reporter Jacob Margolis welcomed mission leaders and the Society’s Emily Lakdawalla to Caltech’s Beckman Auditorium stage. You’ll also hear a musical tribute to Cassini’s Grand Finale. Mat and Bruce Betts add space limited edition space art to the prize package in the What’s Up space trivia contest.

Cassini enters Saturn's atmosphere

Cassini enters Saturn's atmosphere
Artist's impression of Cassini making its final plunge into the atmosphere of Saturn in September 2017.

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Trivia Contest

This week's prizes are the Chop Shop-designed Planetary Radio t-shirt, a 200-point astronomy account, AND a beautiful mounted print by space artist Simon Kregar of an Apollo Lunar Module descending to the moon’s surface.

This week's question:

What is the definition of the metallicity of a star?

To submit your answer:

Complete the contest entry form at or write to us at no later than Wednesday, October 4th at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

When OSIRIS-REx flies by Earth on September 22, 2017, over what continent will it be at its closest approach?


The answer will be revealed next week.

Question from the week before:

On what rocket did the Cassini spacecraft launch in 1997?


Cassini was launched toward Saturn atop a Titan IV B/Centaur on October 15, 1997.

Listen more: Cassini, Planetary Radio Live, mission status, Planetary Radio, Saturn

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