Which famous product design flaw was discovered in the Hubble Space Telescope shortly after its launch, requiring a complex repair mission in 1993?

The Hubble Space Telescope represents one of astronomy's greatest product design achievements. Since its 1990 launch, this orbiting observatory has transformed our understanding of the universe through its groundbreaking technology and design. This poll tests your knowledge about the product development history behind this iconic scientific instrument that continues to shape modern astronomy and inspire future space observation technologies.

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Spherical aberration in the primary mirror
Faulty solar panel deployment mechanism
Defective communication antenna
Malfunctioning gyroscopic stabilizers