The Mirror Database That Hid a Catastrophic Calibration Error Hubble’s 1990 Optical Failure (Ep 681)

Описание: In 1990, NASA launched the Hubble Space Telescope, expecting crystal‑clear images that would redefine astronomy. Instead, the first photos were catastrophically blurry. The telescope’s primary mirror — polished to nanometer precision — had been ground to the wrong curvature. The root cause wasn’t a machining error, but a database failure: a single mis‑entered reference value inside the mirror‑test calibration database caused the null corrector to validate a flawed mirror, hiding the defect until Hubble reached orbit.

This episode explores Hubble’s optical‑verification pipeline in depth: the reflective null corrector, the metrology logs, the interferometer readings, the calibration database, and the fragile quality‑assurance chain that depended on one critical number. It’s a story about precision optics, database integrity, and how a tiny data error nearly crippled the world’s most famous telescope.
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