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During payload familiarization, four members of the STS-93 crew pose in front of the Chandra X-ray Observatory, which is in the Vertical Processing Facility. From left are Commander Eileen Collins, Mission Specialists Michel Tognini of France and Catherine G. Coleman, and Pilot Jeffrey S. Ashby. Tognini represents the Centre National d'Etudes Spatiales (CNES). Collins is the first woman to serve as a shuttle mission commander. She was the first woman pilot of a Space Shuttle, on mission STS-63, and also served as pilot on mission STS-84. The fifth member of the STS-93 crew is Mission Specialist Steven A. Hawley. Chandra is scheduled for launch July 9 aboard Space Shuttle Columbia, on mission STS-93 . Formerly called the Advanced X-ray Astrophysics Facility, Chandra comprises three major elements: the spacecraft, the science instrument module (SIM), and the world's most powerful X-ray telescope. Chandra will allow scientists from around the world to see previously invisible black holes and high-temperature gas clouds, giving the observatory the potential to rewrite the books on the structure and evolution of our universe