NASA has no plans to service the $8.7 billion James Webb Space Telescope (JWST), but it has not completely closed the door on the idea as it prepares a rigorous series of tests designed to ensure in-space repairs will not be needed. When the 6.5-m (21-ft.) telescope launches to the Sun-Earth Lagrange point (L2) in 2018, its launch interface ring will carry optical targets that could be sought out by a servicing robot’s machine vision as it approaches to attach itself in order to make ...

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