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Mission Milestones
August 12, 1999At 2:00 p.m. EDT August 12, controllers commanded the separation of a pyrotechnic latch that has held the door closed since it was integrated with the telescope during the assembly process at TRW in California. Seconds later, the120-pound, 9-foot diameter door swung open, allowing celestial X-ray light to reach the observatory's mirrors for the first time. |
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