What is the spitzers main discovery?

The Spitzer Space Telescope's main discovery was the ability to observe the universe in infrared wavelengths, revealing previously hidden aspects of celestial objects. It identified a wealth of exoplanets, studied the formation of stars and galaxies, and provided insights into the composition of cosmic dust. One of its notable findings was the detection of organic molecules in various regions, suggesting the building blocks of life may be more widespread in the universe than previously thought.