Since the explosion of exoplanet science in the late 1990s, our entire understanding of the universe beyond our own solar system has changed.  We have confirmed over 1,000 planets orbiting other stars, with another 3500 waiting to be confirmed by subsequent observations.  As we search, our prime directive has always been to improve our technology to determine if other Earths exist, and to seek them out.  Every year we have added another discovery that brings us closer to finding a twin of the planet Earth in space.  Today we have come one step closer, and it is indeed a big step....