Sir Isaac Newton
At the age 25, he published the Principia, which laid out the laws of force, motion, and gravity. He went on to invent calculus, showed that light is made up of a spectrum of colors, and made significant advances in optics. Although others would likely have discovered these at some point, it’s truly remarkable that one incredible intellect did so much.
Therefore, Sir Isaac, in honor of your 369th birthday, I dedicate this. Without you, it couldn't have been written. And I imagine it would be even better if all the exoplanets were known when it was.