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Chandra sees bow shock in a merging galaxy cluster NASA PHOTO RELEASE Posted: February 23, 2002 Chandra's image of the extremely hot galaxy cluster 1E0657-56 reveals a bow-shaped shock wave toward the right side of the cluster. This feature, thought to be the result of the merger of a smaller group or sub-cluster of galaxies with 1E0657-56, gives astronomers a rare opportunity to study how clusters grow.
The speed, appearance and shape of the sub-cluster indicates that it would have passed through the core of the larger cluster about 150 million years ago. By the time the gravity of the cluster stops the motion of the sub-cluster, it is likely that the cooler gas will have been totally stripped. 1E0657-56 is of great interest because it is one of the hottest known clusters. Astronomers hope to use this and future observations to determine if the high temperature of the cluster gas is due to shock waves produced by the merger of many sub-clusters.
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Mission Report Gemini 7: The NASA Mission Reports covers this 14-day mission by Borman and Lovell as they demonstrated some of the more essential facts of space flight. Includes CD-ROM. U.S. STOREWORLDWIDE STORE Soviet Space  For the first time ever available in the West. Rocket & Space Corporation Energia: a complete pictorial history of the Soviet/Russian Space Program from 1946 to the present day all in full color. Available from our store.Choose your store:U.S. - U.K. - E.U. - Worldwide Viking patch  This embroidered mission patch celebrates NASA's Viking Project which reached the Red Planet in 1976.Choose your store:U.S. - U.K. - E.U. - Worldwide Apollo 7 DVD  For 11 days the crew of Apollo 7 fought colds while they put the Apollo spacecraft through a workout, establishing confidence in the machine what would lead directly to the bold decision to send Apollo 8 to the moon just 2 months later.Choose your store:U.S. - U.K. - E.U. - Worldwide Gemini 12  Gemini 12: The NASA Mission Reports covers the voyage of James Lovell and Buzz Aldrin that capped the Gemini program's efforts to prove the technologies and techniques that would be needed for the Apollo Moon landings. Includes CD-ROM.Choose your store:U.S. - U.K. - E.U. - Worldwide Columbia Report  A reproduction of the official accident investigation report into the loss of the space shuttle Columbia and its crew of seven. Choose your store:U.S. - U.K. - E.U. - Worldwide Mars Panorama  DISCOUNTED! This 360 degree image was taken by the Mars Pathfinder, which landed on the Red Planet in July 1997. The Sojourner Rover is visible in the image. Choose your store:U.S. Apollo 11 Mission Report  Apollo 11 - The NASA Mission Reports Vol. 3 is the first comprehensive study of man's first mission to another world is revealed in all of its startling complexity. Includes DVD!Choose your store:U.S. - U.K. - E.U. - Worldwide Rocket DVD  If you've ever watched a launch from Kennedy Space Center, Cape Canaveral, Vandenberg Air Force Base or even Kodiak Island Alaska, there's no better way to describe what you witnessed than with this DVD.Choose your store:U.S. - U.K. - E.U. - Worldwide Apollo patches  The Apollo Patch Collection: Includes all 12 Apollo mission patches plus the Apollo Program Patch. Save over 20% off the Individual price. Choose your store:U.S. - U.K. - E.U. - Worldwide Current Shuttle Mission Patch  The official embroidered patch for shuttle Endeavour's flight to finish building Japanese section of the space station.U.S. STOREWORLDWIDE STOREHubble Patch  The official embroidered patch for mission STS-125, the space shuttle's last planned service call to the Hubble Space Telescope, is available for purchase.U.S. STOREWORLDWIDE STOREAres Patch  The Ares Project will develop two new rockets to launch astronauts back to the Moon under NASA's Vision for Exploration. The Ares 1 will employ a single space shuttle solid rocket booster to loft the Orion crew capsule. The gigantic Ares 5 will haul the equipment and cargo needed for such lunar voyages. This is the Ares emblem.U.S. STORE Project Orion  The Orion crew exploration vehicle is NASA's first new human spacecraft developed since the space shuttle a quarter-century earlier. The capsule is one of the key elements of returning astronauts to the Moon.U.S. STOREFallen Heroes Patch Collection  The official patches from Apollo 1, the shuttle Challenger and Columbia crews are available in the store.U.S. STOREWORLDWIDE STORE
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