1. The flight of Apollo 11, the first Lunar landing mission. The Apollo 11 Saturn V space vehicle, or rocket, lifted off with astronauts Neil A. Armstrong, Michael Collins and Edwin E. Aldrin, Jr., at 9:32 a.m. EDT July 16, 1969, from Kennedy Space Center's Launch Complex 39A. Flying at transonic speeds -- speeds varying near and at the speed of sound (supersonic) -- can generate impressive condensation clouds caused by the Prandtl-Glauert Singularity. For a scientific explanation, see Professor M. S. Cramer's Gallery of Fluid Mechanics, Prandtl-Glauert Singularity at <http://www.GalleryOfFluidMechanics.com/conden/pg_sing.htm>; and Foundations of Fluid Mechanics, Navier-Stokes Equations Potential Flows: Prandtl-Glauert Similarity Laws at <http://www.Navier-Stokes.net/nspfsim.htm>. Photo Credit: Apollo 11 Launch, July 16, 1969, GRIN (http://grin.hq.nasa.gov) Database Number: GPN-2000-000627, National Aeronautics and Space Administration (NASA, http://www.nasa.gov), Government of the United States of America.
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