Planetary Radio • Sep 27, 2017

Celebrating Cassini…Live!

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On This Episode

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Earl Maize

Cassini Mission Program Manager for Jet Propulsion Laboratory

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Linda Spilker

Voyager Mission Project Scientist at NASA's Jet Propulsion Laboratory

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Julie Webster

Cassini Spacecraft Operations Office Manager for 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.

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 [email protected] 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.