This day in history.

March 10, 1969: A Flight Readiness Review was conducted for the Lunar Landing Training Vehicle (LLTV) at the Manned Spacecraft Center (now Johnson Space Center). This vehicle was crucial for Apollo commanders to practice the unique flying characteristics of the Lunar Module during the final stages of landing on the Moon.

March 10, 1977: Scientists at the Kuiper Airborne Observatory and the Perth Observatory in Australia made observations of Uranus passing in front of a distant star (SAO 158687). This event allowed them to study Uranus's rings in greater detail.

March 10, 2003: The first Delta IV (Medium) EELV (Evolved Expendable Launch Vehicle) military launch occurred from Cape Canaveral. This marked an important step in the use of the Delta IV for national security payloads.

March 10, 2009: Space Shuttle Discovery launched on STS-119, the 28th shuttle mission to the International Space Station. The primary purpose of this mission was to deliver the final pair of solar array wings (the S6 truss segment) to the ISS, completing the station's power grid.