When the Hubble Space Telescope was first launched in 1990, NASA discovered a serious flaw that affected its imaging capabilities. What was this critical defect?

The Hubble Space Telescope revolutionized our view of the cosmos when it was launched, but its journey to the stars wasn't without complications. Test your knowledge about one of NASA's most famous product launches that changed astronomy forever. This poll explores the fascinating story behind this incredible scientific instrument that has provided us with some of the most breathtaking images of our universe.

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The primary mirror had been ground to the wrong shape, creating spherical aberration
The solar panels failed to deploy completely, limiting power to the imaging systems
The telescope's guidance system malfunctioned, causing images to blur during exposure
Radiation damage to the CCD sensors created permanent dead pixels in all images