Which innovative product design feature of the Hubble Space Telescope allowed it to overcome its initial mirror flaw and continue operating successfully for decades?

The Hubble Space Telescope represents one of astronomy's most significant product design achievements. Despite its rocky start with a flawed mirror, NASA's innovative solution transformed it into an astronomical icon that has revolutionized our understanding of the cosmos. This trivia question explores the groundbreaking design elements that allowed for Hubble's unprecedented success and longevity in the harshest environment imaginable: space.

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COSTAR (Corrective Optics Space Telescope Axial Replacement) - specialized corrective optics installed during the first servicing mission
Quantum Adaptive Lens System - an AI-powered self-adjusting mirror system that reconfigured automatically after deployment
Remote Mirror Reformation Technology - ground-based lasers that reshaped the mirror's surface through targeted heating
Digital Image Enhancement Processors - software algorithms that mathematically corrected distorted images after transmission to Earth