Director of the Johns Hopkins University Applied Physics Laboratory Ralph Semmel delivers remarks, Monday, Dec. 31, 2018 at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

Director of the Johns Hopkins University Applied Physics Laboratory Ralph Semmel celebrates with other mission team members after they received signals from the spacecraft that it is healthy and collected data during the flyby of Ultima Thule, Tuesday, Jan. 1, 2019 at the Mission Operations Center of the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

New Horizons mission managers rejoice after they received signals from the spacecraft that it is healthy and collected data during the flyby of Ultima Thule, Tuesday, Jan. 1, 2019 at the Mission Operations Center of the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Pictured from left; Director of the Johns Hopkins University Applied Physics Laboratory Ralph Semmel: New Horizons principal investigator Alan Stern of the Southwest Research Institute (SwRI), Boulder, CO: Acting director of Planetary Science at NASA Headquarters Lori Glaze: APL Space Department Head Emeritus Stamatios (Tom) Krimigis, and New Horizons Mission Operations Manager Alice Bowman. Photo Credit: (NASA/Bill Ingalls)