One of the best-kept secrets of our times is that planets exist outside our Solar System. Exoplanets are planets orbiting one of the billions of stars we see in the nighttime sky. As our ability to search through the vastness of space increases, we continue to find ourselves faced with an ever-expanding potential of discovering planets that could look and behave like Earth. That's all fine and dandy, but wouldn't you impress your friends with your exoplanetary knowledge instead? Look no further! The History of Exoplanetary ExplorationHumans began their interest in exoplanets around the 16th century. The Italian philosopher Giordano Bruno was the first to publicly support the idea based on his belief in the Copernican theory that Earth and the other known planets of the time were indeed orbiting around the sun. He speculated that this should be the case for different stars in the universe. In the 18th Century, Isaac Newton…