The payload canister transporter waits while the payload canister is lifted up the Rotating Service Structure above it.

The payload canister transporter that brought the Chandra X-ray Observatory to Launch Pad 39B waits while the payload canister is lifted up the Rotating Service Structure above it. Umbilical hoses are still attached during the process, maintaining a controlled environment during the transfer. At left is seen a part of the Space Shuttle Columbia, which will carry the observatory into space. 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. Chandra is scheduled for launch no earlier than July 20 aboard Space Shuttle Columbia, on mission STS-93