Roald Sagdeev's guest appearances

Roald Sagdeev

Planetary Radio: Space Exploration, Astronomy and Science

CTBTO Faces

Elon Musk

Barack Obama

Mike Rowe

Adam Schiff

Phil Plait

Ben Miller

Sara Seager

Neil deGrasse Tyson

Ray Bradbury

Mary Roach

Andy Weir

Garrett Reisman

Neil Armstrong

Bill Nye

Katie Mack

OwlTail

Former Soviet Space Program Director Roald Sagdeev on the Sputnik 1 AnniversaryLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

Former Soviet Space Program Director Roald Sagdeev on the Sputnik 1 AnniversaryLearn more about your ad choices. Visit <a href="http://megaphone.fm/adchoices" rel="nofollow" target="_blank">megaphone.fm/adchoices</a><p>See <a href="https://omnystudio.com/listener" rel="nofollow" target="_blank">omnystudio.com/listener</a> for privacy information.</p><p>See <a href="https://omnystudio.com/listener" rel="nofollow" target="_blank">omnystudio.com/listener</a> for privacy information.</p>

Former Soviet Space Program Director Roald Sagdeev on the Sputnik 1 Anniversary