Assistant Director for Science and Exploration, NASA’s Science Mission Directorate
Three NASA leaders talk with host Mat Kaplan about the progress we're making toward leaving footprints on the Red Planet. Emily Lakdawalla showcases great new space images from the amateur community. Bill Nye tells us how a LightSail technical challenge has been solved. Bruce Betts can't take his eyes off Mars as it makes its closest pass of Earth in years. Don’t miss the new arrangement of our theme!
There will be three winners of Offworld Trading Company, the new and beautiful, engaging and scientifically-accurate economic strategy game set on Mars. A grand prize winner will also get a 200-point iTelescope.net astronomy account.
This week's question:
During the current closest approach, how big is the disc of Mars as seen from Earth as measured in arc-seconds?