The Ring of Charon (The Hunted Earth)
When Larry Chao, a junior scientist, figures out a way to control artificial gravity via the ring and unauthorized surrounding Charon, he makes a grave mistake. He allows an otherwise unknown alien race called the Charonians to disappear the Earth via a created wormhole. This story is masterfully told in two separate perspectives. The remaining humans not located on Earth and Earth's destroyers, the Charonians.