Stock Photo - 02/08/1999 ___ Inside the Vertical Processing Facility VPF, workers check the overhead cable that will lift the Chandra X_ray Observatory out of its protective container. While in the VPF, the telescope will undergo final installation of associated electronic components, it will also be tested, fueled and mated with the Inertial Upper Stage booster. A set of integrated tests will follow. 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