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Flash-PIA02108.jpgFlash!!!120 visiteThis image shows a flash produced in a laboratory by a high-velocity bead slamming into dust. Though the flash itself can't be resolved, its brilliant effects can be seen in this three-second time exposure. Scientists say that the collision between Deep Impact's Impactor and comet Tempel 1 may produce a similar flash.
This flash occurred when a quarter-inch sphere smashed into powdered dust at a speed of 6,4 Km-per-second (about 4 miles-per-second).
Even though the actual flash lasted less than 50 millionths of a second, the camera recorded the hot debris in the impact crater (center) and the streaking ejecta.
This experiment was performed at NASA's Ames Research Center, Moffett Field, Ca.
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Z machine_sandia_big-1.jpgThe Heart of a Star...On Earth: the Z Machine139 visiteWhy is this plasma so hot? Physicists aren't sure. What is known for sure is that the Z Machine running at Sandia National Laboratories created a plasma that was unexpectedly hot. The plasma reached a temperature in excess of two billion Kelvin (!), making it arguably the hottest human made thing ever in the history of the Earth and, for a brief time, hotter than the interiors of stars. The Z Machine experiment, pictured above, purposely creates high temperatures by focusing 20 million amps of electricity into a small region further confined by a magnetic field. Vertical wires give the Z Machine its name. During the unexpected powerful contained explosion, the Z machine released about 80 times the world's entire electrical power usage for a brief fraction of a second. Experiments with the Z Machine are helping to explain the physics of Solar flares, design more efficient nuclear fusion plants, test materials under extreme heat, and gather data for the computer modeling of nuclear explosions.
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as16-113-18346.jpgAS 16-113-18346 - The "Passive Seismic Experiment"73 visiteCaption NASA:"122:06:24 MT - Showing a sprinkling of dirt on the north side of the thermal skirt that surrounds the Passive Seismic Experiment (PSE)".MareKromium
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as16-113-18347.jpgAS 16-113-18347 - The "Passive Seismic Experiment"77 visiteCation NASA:"Charlie has backed up to get this picture of the PSE, with the Central Station and the black-finned RTG in the background.
The thumper/geophone cable anchor is to the right of the Central Station".MareKromium
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