Planetary Radio • Oct 25, 2017

Searching for ET With Pete Worden

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Pete Worden

Executive Director for Breakthrough Initiatives

Are we alone? The nearly sixty-year effort to answer that question has gotten a big boost from the Breakthrough Initiatives, funded by Yuri Milner and led by former NASA Ames Research Center director Pete Worden, who is our guest this week. Planetary Society Digital Editor Jason Davis has written an outstanding overview of the Search for Extraterrestrial Intelligence. As we look and listen to the skies for ET, Bruce Betts keeps us up on where our own family of planets is. He joins Mat for another What’s Up segment and a new space trivia contest.

The National Radio Astronomy Observatory’s Very Large Array in New Mexico
The National Radio Astronomy Observatory’s Very Large Array in New Mexico Image: National Radio Astronomy Observatory

Related Links:

This week's prizes are the Chop Shop-designed Planetary Society t-shirt, a 200-point astronomy account, AND a shopping bag adorned by space artist Michelle Rouch with her beautiful artwork titled Apollo.
"Apollo" by Michelle Rouch
"Apollo" by Michelle Rouch Image: Michelle Rouch

This week's question:

Where are the Laser Interferometer Gravitational-Wave Observatory (LIGO) gravitational wave detectors located?

To submit your answer:

Complete the contest entry form at or write to us at [email protected] no later than Wednesday, November 1st at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

What two moons in our solar system have the highest and second highest densities?


The answer will be revealed next week.

Question from the week before:

Let’s play “Where in the Solar System?” On what body in the solar system can you find a 92-kilometer diameter crater named Murray for Bruce Murray, co-founder of the Planetary Society and former Director of JPL?


Mars is where you can find a 92-kilometer crater named Murray for the late Bruce C. Murray, pioneering planetary scientist, co-founder of the Planetary Society, and former director of the Jet Propulsion Laboratory.