Which scientific product innovation was originally designed for medical imaging but unexpectedly became essential for astronomical research due to its unique light-gathering capabilities?

Scientific advancement often depends on groundbreaking product design and innovation. Behind many of today's most important scientific tools are fascinating stories of product development, unexpected discoveries, and brilliant design solutions. This poll tests your knowledge about a revolutionary scientific product that changed how researchers approach their work.

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Charge-Coupled Device (CCD)
Scanning Tunneling Microscope
Gas Chromatograph
Mass Spectrometer