NASA

Niall Kennedy / Flickr

NASA’s Cassini spacecraft, with an Iowa-made instrument aboard, is near the end of its 20 year voyage.

On this edition of River to River, Ben Kieffer talks with Bill Kurth, research scientist in the department of physics and astronomy at the University of Iowa, about the significance of the Cassini mission and spacecraft, currently in orbit around Saturn.

"Cassini is kind of a veteran. It arrived in orbit at Saturn in 2004, in the summer. That was about a seven year journey from the Earth," he says. "So we've been in orbit for almost 13 years."

NASA/JPL-Caltech

Mars has been receiving a lot of attention recently. In the new Ridley Scott movie, The Martian, a NASA botanist is stranded on Mars and has to rely on his own ingenuity to survive. In real life, scientists have discovered evidence of present day water on the red planet.

On this edition of River to River, Ben Kieffer sits down with astrophysicists, Steve Kawaler of Iowa State University and Jasper Halekas of the University of Iowa, along with retired NASA astronaut, Clayton Anderson, to discuss the accuracy and impact of films like The Martian.