Scientist and Hubble Repairman John Grunsfeld

Could a single ancient impact have briefly transformed one of the Solar System’s darkest moons into a cryovolcanic world? When Voyager 2 flew past Uranus in 1986, it captured the only close-up images we have of Umbriel, a heavily cratered, charcoal-dark satellite long considered ...  Show more

They informed and entertained together throughout the first 20 years of Planetary Radio. Listen in as the Society’s chief scientist and book club edition host Mat Kaplan share the mic once again for a delightful conversation about Dr. Betts’ two new space books for young people. ...  Show more

After decades in the making, the James Webb Space Telescope (JWST) finally launched on 25 December 2021, ushering in a new era for astronomy. On Monday the $10bn mission reached its destination, the L2 Lagrange point 1.5 million kilometres from Earth, where it will remain in orbi ...  Show more

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The Space Ne ...  Show more

SpaceTime Series 26 Episode 27 *The asteroid that almost swallowed a spacecraft It sounds like something out of a 1950s sci-fi movie, but it seems that the asteroid Bennu almost swallowed NASA’s Osiris-Rex spacecraft during its sample collection maneuver. *59 new exopla ...  Show more

Paul Geithner is the Deputy Project Manager — Technical for the James Webb Space Telescope at NASA's Goddard Space Flight Center in Greenbelt, Maryland. Paul joins Jonathan to give him a crash course in what the electro-magnetic spectrum is, how space debris can effect space prog ...  Show more