Hubble Space Telescope Problem Delays STS-125 Launch
"Due to the significant Hubble Space Telescope malfunction that occurred over the weekend affecting the storage and transmittal of science data to Earth, NASA will evaluate the investigation results before fully determining the impact to launch of the STS-125 servicing mission. Under consideration is the possibility of flying a back-up replacement system as part of the payload, which could be installed during the servicing mission."