Which famous astronomical instrument was initially considered a 'marketing disaster' after launch due to a manufacturing flaw in its primary mirror that caused spherical aberration?

The astronomy industry has seen remarkable innovations and products over the years, but not all launches reach the stars! This trivia question explores one of the most notable product challenges in modern astronomy - a billion-dollar telescope that nearly became a spectacular failure before ultimately transforming our understanding of the universe. Test your knowledge about this famous product recovery story that combined cutting-edge science, emergency engineering, and one of the most ambitious repair missions in space history.

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Hubble Space Telescope
James Webb Space Telescope
Spitzer Space Telescope
Chandra X-ray Observatory