Ten years ago, on July 23, 1999, NASA's Chandra X-ray Observatory was launched aboard the space shuttle Columbia and deployed into orbit. With its unrivaled ability to create high-resolution X-ray images, Chandra has enabled astronomers to investigate phenomena as diverse as comets, black holes, dark matter and dark energy. Originally designed for five years of service, Chandra has doubled its original mission, ushering in an unprecedented decade of discovery for the high-energy universe. That is not bad for a space telescope that was designed to not be serviced after deployment.