Which product innovation was specifically recalled and serviced in orbit, leading to dramatically improved astronomical observations?

The astronomy industry has seen remarkable product innovations over the decades, revolutionizing how we observe and understand the cosmos. From primitive telescopes to advanced space-based observatories, these technological leaps have expanded our view of the universe. This trivia question focuses on a groundbreaking product innovation that changed astronomy forever. Test your knowledge of how product development has shaped our ability to explore the stars!

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The Hubble Space Telescope, which received a 'contact lens' correction in 1993 to fix its flawed primary mirror
The James Webb Space Telescope, which needed its sunshield replaced after deployment in 2022
The Kepler Space Telescope, which had its main camera array replaced after a critical failure in 2014
The Chandra X-Ray Observatory, which required an emergency repair to its cooling system in 2005