New Horizons Principal Investigator, Johns Hopkins University Applied Physics Laboratory
New Horizons passed through the orbit of Neptune on August 25th. By cosmic coincidence, this was the 25th anniversary of Voyager 2’s flyby of that big, blue world. We catch Principal Investigator Alan Stern right after a celebration in Washington. Alan also talks about the Rosetta comet mission and a new Uwingu initiative. Emily Lakdawalla shares a gorgeous new image of Neptune based on Voyager data. Bill Nye tells us why a major ground test of the LightSail solar sail was cancelled. Waiting for an easy space trivia contest question? This is your week!