United States Microgravity Payload-4 (USMP-4) experiments are lifted and placed into the payload canister at Kennedy Space Center. The vertical tube in the center of the USMP-4 group of experiments is the Advanced Automated Directional Solidification Furnace (AADSF), which will be used by researchers to study the solidification of semiconductor materials in microgravity. Scientists will be able to better understand how microgravity influences the solidification process of these materials and develop better methods for controlling that process during future Space flights and Earth-based production. The USMP-4 will launch aboard the Space Shuttle Columbia as part of the STS-87 mission, scheduled for launch Nov. 19. (Photo Release Date: 10/26/97 )

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