Founder and former leader, Astronomers Without Borders
Mike Simmons is president of Astronomers Without Borders. He returns to Planetary Radio to tell us how we can be part of this new month-long celebration. Emily Lakdawalla gains a new title and views her choice for a Martian close-up. Bill Nye learns there may be ten times as many galaxies as thought. What's your new mnemonic for Saturn's rings! Tell Mat and Bruce and win a Planetary Radio t-shirt.