Which NASA telescope product, launched in 1990, featured a revolutionary design with a 2.4-meter primary mirror and was the first major optical telescope to be placed outside Earth's atmosphere?

In the world of astronomy, product design isn't just about aesthetics—it's about pushing the boundaries of human knowledge. Throughout history, certain telescopes have represented quantum leaps in our ability to observe the cosmos. One particular instrument revolutionized our understanding of the universe in the 1990s, becoming one of the most significant product designs in scientific history. Test your knowledge about this game-changing astronomical instrument!

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Hubble Space Telescope
Spitzer Space Telescope
Chandra X-ray Observatory
Compton Gamma Ray Observatory