New Horizons Ultima Thule Flyby

New Horizons principal investigator Alan Stern of the Southwest Research Institute (SwRI), Boulder, CO gives remarks about the New Horizons mission during a briefing discussing small bodies missions, Monday, Dec. 31, 2018 at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

New Horizons principal investigator Alan Stern of the Southwest Research Institute (SwRI), Boulder, CO gives remarks about the New Horizons mission during a briefing discussing small bodies missions, Monday, Dec. 31, 2018 at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)