United States Microgravity Payload-4 (USMP-4) experiments are lifted atop the white triangular Multi-Purpose Experiment Support Structure at Kennedy Space Center (KSC) before placement into the payload canister. Seen in the foreground of the canister is the Spartan-201 payload, covered with a protective wrap. Spartan-201 is a small satellite involved in research to study the interaction between the Sun and its wind of charged particles. The vertical tube high atop the USMP-4 payload 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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