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This week's prizes are a lovely Planetary Radio t-shirt and Bill Nye’s personalized greeting on your voicemail!

This week's question:

What was Carl Sagan’s middle name?

To submit your answer:

Complete the contest entry form at http://planetary.org/radiocontest or write to us at [email protected] no later than Tuesday, November 3rd at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

As of 1980 AND 2015, how many asteroids had been explored by spacecraft either by flyby or orbiter? Here’s a hint: There were zero in 1980.

Answer:

The answer will be revealed next week.

Question from the week before:

As of 1980 AND 2015, how many worlds had either been soft-landed on or had successful atmospheric probes? No touch-and-go or fly-through sample return missions.

Answer:

Four planets had been soft-landed on and/or atmospherically-probed by 1980: Earth, Venus, Mars and the Moon. Jupiter, Titan, Eros and Comet 67P were added by 2015.