NASA is looking seriously at launching shuttle Atlantis on the final repair mission to the Hubble Space Telescope a day earlier than scheduled. The move would be an attempt to avoid conflict with a military mission also scheduled for launch in May.
NASA is also saying the repair mission looks less risky than it had earlier. The concern was a collision with debris in orbit. That fear was heightened after the collision of an Iridium satellite and a defunct Russian satellite last winter, which created a huge new debris cloud.
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