Hope for Pluto—Should We Re-Redefine Planets?

Thunderbirds Director Jonathan Frakes of Star Trek FameLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

26 Juli 200428min

Apollo Astronauts Visit Planetary RadioLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

19 Juli 200428min

A Visit With NASA Associate Administrator Ed WeilerLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

12 Juli 200428min

Cassini-Huygens Reaches SaturnLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

5 Juli 200428min

A SpaceShipOne Special!Learn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

28 Juni 200428min

Cassini Visits Phoebe at Saturn!Learn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

21 Juni 200428min

Donna Shirley and Science Fiction's New HomeLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

14 Juni 200428min

How's the Weather on Mars?Learn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

7 Juni 200428min