U.S. President Donald Trump signs the "Space Policy Directive 1" that establishes the foundation for a crewed mission to the Moon, while also maintaining a longer-term NASA goal of landing a man on Mars.
SpaceX launches a weather observation satellite, Deep Space Climate Observatory, at 6:03 p.m. EST from Cape Canaveral, Florida (for the US Air Force-NASA-NOAA), but postpones making of a second attempt to land a Falcon 9 v1.1 rocket on a floating platform called the autonomous spaceport drone ship, following the January 10 failure during the SpaceX CRS-5 mission. SpaceX instead, attempts a "mock" soft-landing into the Atlantic ocean
NASA observes the asteroid YU 55 as it makes a close Earth flyby, passing within 0.85 lunar distances (about 201,700 miles) of the Earth. YU 55 is approximately 400 m across, and is the largest asteroid to make a close pass since 1976.
A de Havilland Canada DHC-3 Otter seaplane crashes near Aleknagik, Alaska, killing five people, including former U.S. Senator Ted Stevens. Former NASA Administrator Sean O'Keefe and O'Keefe's son were aboard the plane, but survived.