NASA, Newseum Celebrate 40th Anniversary of Apollo 10 on May 18
WASHINGTON — NASA and the Newseum will celebrate the 40th anniversary of the Apollo 10 mission during a program at 12:30 p.m. EDT on Monday, May 18, in Washington.
Astronauts Tom Stafford and Gene Cernan will participate in the program moderated by journalist-in-residence Nick Clooney. The [...]
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Atlantis Lifts Off! Although we are celebrating the Apollo missions, we are also focused on manned space flight. The launch of Atlantis was one of those perfect days. [...] Mrs O’Donahue at Hamelin Pool saves the day Number of dishes Grows for World Moon Bounce Day |
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Snapshot of the International Space Station  On March 13, 2008, the International Space Station passed across the field-of-view of Germany's remote sensing satellite, TerraSAR-X, at a distance of 195 kilometers, or 122 miles, and at a relative speed of 34,540 kilometers per hour, or more than 22,000 mph. In contrast to optical cameras, radar does not 'see' surfaces. Instead, it is much more aware of the edges and corners which bounce back the microwave signal it transmits. Smooth surfaces such as those on the station's solar generators or the radiator panels used to dissipate excess heat, unless directly facing the radar antenna, tend to deflect rather than reflect the radar beam, causing these features to appear on the radar image as dark areas. The radar image of the station therefore looks like a dense collection of bright spots from which the outlines of the space station can be clearly identified. The central element on the station, to which all the modules are docked, has a grid structure that presents a multiplicity of reflecting surfaces to the radar beam, making it readily identifiable. This image has a resolution of about one meter (about 39 inches). In other words, objects can be depicted as discrete units--that is, shown separately--provided that they are at least one meter apart. If they are closer together than that, they tend to merge into a single block on a radar image. Since this image was taken, the station has expanded and is more than 90 percent complete, including a full complement of solar arrays. Image Credit: DLR Read More |
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