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Planetary RadioOctober 4, 2016

Farewell Rosetta!

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Emily Lakdawalla 2017 headshot square serene
Emily Lakdawalla

Solar System Specialist, The Planetary Society

The European Space Agency’s magnificent Rosetta mission ended last week as the spacecraft gently touched down on the comet it has revealed. You’ll hear highlights of the final countdown, and Emily Lakdawalla’s impressions gained at the European Space Operations Center. Bill Nye was there to hear Elon Musk explain his plans to colonize Mars. Bruce Betts gets the comfy chair in this week’s What’s Up segment.

OSIRIS view of Comet Churyumov-Gerasimenko on December 11, 2015

ESA / Rosetta / MPS for OSIRIS Team MPS / UPD / LAM / IAA / SSO / INTA / UPM / DASP / IDA

OSIRIS view of Comet Churyumov-Gerasimenko on December 11, 2015
Rosetta took this photo of comet 67P/Churyumov-Gerasimenko on December 11, 2015. It is the first image released as part of OSIRIS' "image of the day" program.

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Trivia Contest

This week's prizes are a gorgeous Planetary Society rubber asteroid and a 200-point astronomy account.

This week's question:

What are the names of the two asteroids Rosetta studied, and the name of the comet it orbited and was just set down on?

To submit your answer:

Complete the contest entry form at or write to us at no later than Tuesday, October 11th at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

What is the surface gravity on Jupiter’s moon Europa in Gs?


The answer will be revealed next week.

Question from the week before:

Where are the three Deep Space Network facilities?


The Deep Space Network receivers are at Goldstone near Barstow, California, Madrid, Spain and Canberra, Australia.

Listen more: Commercial spaceflight, Rosetta and Philae, Humans to Mars, comets, mission status, Future Robotic Missions, human spaceflight, comet Churyumov-Gerasimenko, Planetary Radio, Mars, conference report, Bill Nye

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