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Planetary Radio Episodes

For every week since 2002, Planetary Radio has visited with a scientist, engineer, project manager, advocate or writer who provides a unique perspective on the quest for knowledge about our solar system and beyond. We also showcase regular features that raise your space IQ while they put a smile on your face.

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Last Week, Mars. This week, An Asteroid Called Bennu.

December 05, 2018 • 40:17

The InSight lander has only just arrived on Mars. Now, OSIRIS REx has reached asteroid Bennu after traveling through deep space for a year and a half.

Sailing to an Asteroid on the Light of the Sun

October 24, 2018 • 49:25

LightSail 2 is not the only solar sail in the universe. NASA’s Marshall Space Flight Center and the Jet Propulsion Lab are preparing to send NEA Scout on a long, light-propelled journey to a near Earth asteroid.

An African Observatory Hunts Killer Asteroids

July 18, 2018 • 42:55

One of the Planetary Society’s 2018 Shoemaker Near-Earth Object grants has gone to astronomers searching the sky from a mountaintop in the North African nation of Morocco.

Dwarf Planet Ceres Thrills as a Dying Visitor Closes In

July 04, 2018

Ceres is the queen of the asteroid belt. Her first Earthly visitor is nearing its last days in spectacular style. Dawn Mission Director and Chief Engineer Marc Rayman returns with stunning images taken from just 35 kilometers or 22 miles above the dwarf planet, and a preview of the spacecraft’s last days.

It’s Asteroid Week with NASA’s Planetary Defense Officer

June 27, 2018 • 40:44

The dinosaurs regret their lack of a space program. 200 million years later, humans are gearing up to defend themselves from a species-ending rock.

Amateur Astronomers Work To Save Earth From Asteroids!

March 14, 2018 • 36:35

Seven astronomers have been selected to receive Shoemaker NEO (Near Earth Object) grants from the Planetary Society. They and their observatories span the planet. We’ll meet an American and an Australian. Society Chief Scientist Bruce Betts provides an overview of the grant program and later returns for this week’s edition of What’s Up. The Planetary Society’s Kate Howells reports on the outlook for space funding in Canada’s newly-released federal budget. She and Society CEO Bill Nye also met with Prime Minister Justin Trudeau.

A Visitor From the Stars: ‘Oumuamua

December 06, 2017 • 47:23

The first confirmed interstellar visitor to our solar system is a needle-shaped asteroid given the Hawaiian name ‘Oumuamua. Karen Meech leads the team that is learning as much about it as possible before it leaves our neighborhood, never to return.

Dawn: Ten Years of Exploration

October 11, 2017 • 59:03

Dawn Mission Director and Chief Engineer Marc Rayman helps us salute the ion-engine powered spacecraft that first orbited asteroid Vesta in the main asteroid belt and then moved to dwarf planet Ceres, revealing two fascinating worlds.

A Cosmic Voyage with Astronomer Sandra Faber

July 05, 2017 • 1:04:12

Veteran astronomer and cosmologist Sandra Faber has just been awarded the Gruber Prize for Cosmology, honoring more than forty years of pioneering work. She talks with Mat Kaplan on this week’s show.

Happy Asteroid Day!

June 28, 2017 • 39:08

Asteroid Day, June 30th, marks the anniversary of the great Tunguska impact that leveled a Siberian forest. It reminds us that a Near Earth Object can destroy a city or even a civilization. Former Minor Planet Center Director Tim Spahr reviews our efforts to find and understand these bodies.

Aerospace Corporation President and CEO Steve Isakowitz

April 12, 2017 • 58:09

The Aerospace Corporation has been innovating since 1960. Now it’s headed by a former leader of “New Space” company Virgin Galactic. President and CEO Steve Isakowitz talks about the evolving culture of the space industry.

Planetary Radio Live: Near Earth Objects—The Killer Asteroid Threat

February 22, 2017 • 1:38:52

Leaders of the quest to find, understand and protect ourselves from the asteroids and comets called Near Earth Objects gathered with host Mat Kaplan for a live conversation about this existential threat from space.

Ben Miller Says The Aliens are Coming!

January 10, 2017 • 1:13:11

We are joined by British physicist turned comedian and actor Ben Miller, author of The Aliens are Coming! The Extraordinary Science Behind our Search for Life in the Universe.

Art That Captures the Beauty and Science of Space

December 20, 2016 • 44:52

Marilynn Flynn, Simon Kregar and Rick Sternbach are masters of space art. They talk about how their work furthers science and captures the imagination.

Inside Virgin Galactic’s SpaceShipTwo

November 08, 2016 • 45:42

Host Mat Kaplan traveled to California’s Mojave Desert for a tour of Virgin Galactic’s The Spaceship Company, where the second SpaceShipTwo was built and is undergoing flight tests. TSC Executive VP Enrico Palermo was his guide.

OSIRIS-REx: The Voyage to Bennu Begins, With Dante Lauretta

September 13, 2016 • 28:50

In two years a Near Earth Asteroid now known as Bennu will have a visitor from Earth. OSIRIS-REx Principal Investigator Dante Lauretta reports on his mission’s successful launch.

Space Policy Edition #4: Near Earth Asteroids—Why we go, how we find them, and maybe mine them

September 02, 2016 • 1:04:18

In honor of OSIRIS-REx—NASA’s newest asteroid mission—we explore the policy and history of near-Earth Objects: why NASA explores them, how the government plans to find and defending the planet, and the how policy can keep up with ambitious plans to mine asteroids.

Planetary Radio Extra: Shining a Million Watt Flashlight on an Asteroid

June 28, 2016 • 19:35

PlanRad’s celebration of Asteroid Day (June 30th) continues as we call UCLA grad student Adam Greenberg at the Arecibo Observatory in Puerto Rico.

OSIRIS REx: Ready for a Voyage to Bennu

June 21, 2016 • 34:17

OSIRIS-REx will launch toward Near Earth Asteroid Bennu soon. In an early celebration of Asteroid Day, mission leader Dante Lauretta tells us how learning about asteroids may teach us about our own origins, and help us avoid a cataclysmic impact.

Michel Mayor, Discoverer of the First Extrasolar World

April 05, 2016 • 39:41

Michel Mayor and his team rocked the astronomy world with their 1995 announcement, but this modest man says it was a discovery whose time had come.

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