On Christmas Day, NASA is scheduled to launch the James Webb Space Telescope. If successful, it could alter humanity’s understanding of its place in the universe and reinvigorate American science and technology. But at a cost of some $11 billion, the new instrument is also a significant risk. NASA has no Plan B if it fails. And fail it could: Hundreds of parts and processes must operate perfectly or jeopardize the entire mission — and potentially set astronomy back by a generation.
NASA never
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