A rescue mission for a NASA space telescope has been delayed due to a last-minute launch problem. The issue occurred with Northrop Grumman's rocket-launching plane, which took off from the Marshall Islands. A software problem caused the launch to be aborted, keeping the Pegasus rocket attached to the plane.

The problem has been fixed, and another launch attempt was planned. The rocket is carrying a robotic spacecraft designed to capture the Swift Observatory, a telescope that will crash to Earth by October if not rescued.

Further details about the mission and its status are available from NASA and other sources. The Swift Observatory has made significant contributions to science, detecting thousands of gamma ray bursts and explosions during its operation.