Which famous space telescope was initially considered a retail failure due to a significant manufacturing flaw in its primary mirror that caused blurry images?

In the competitive world of astronomical equipment, not every product becomes a star. This poll explores one of astronomy's most notable product failures that, despite its initial problems, ultimately transformed our understanding of the cosmos. Test your knowledge of this famous astronomical instrument that started as a marketing disaster but became an invaluable scientific tool after its dramatic rescue mission.

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