Planetary Radio • Mar 03, 2015

Jim Bell Welcomes “The Interstellar Age”

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Jim Bell

Past President (2008-2020), Board of Directors of The Planetary Society; Professor, School of Earth and Space Exploration, Arizona State University; Principal Investigator, NASA Perseverance rover Mastcam-Z instruments

Planetary scientist and author Jim Bell has just written “The Interstellar Age—Inside the Forty-Year Voyager Mission.” He talks with Mat Kaplan about the magnificent grand tour of the outer solar system that is now headed toward the stars. Emily Lakdawalla shares the latest news about dwarf planet Ceres and the Dawn mission. Bill Nye fondly remembers Leonard Nimoy. The space trivia contest generates a bit of cosmic potty humor on What’s Up.

Jim Bell's "The Interstellar Age"
Jim Bell's "The Interstellar Age" Image: Dutton

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This week's prize is a signed copy of Jim Bell’s “The Interstellar Age—Inside the Forty-Year Voyager Mission.”

This week's question:

When was Ceres discovered, and who discovered it?

To submit your answer:

Complete the contest entry form at or write to us at [email protected] no later than Tuesday, March 10th at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

About how close to the moon’s surface did Snoopy, the Apollo 10 Lunar Module, get?


The answer will be revealed next week.

Question from the week before:

How many bathrooms or toilets are there on the International Space Station?


There are two toilets (dunnies) on the International Space Station.