The third planet in the Old Sol system, Old Earth was the orginal home of humanity before the hyperdrive was invented. Old Earth has a radius of approximently 6,371.0 km and a mass of 5.9736×1024 kg. Its escape velocity is 11.186 km/s. Up until Dous Novella, Old Earth was the headquarters of the Civilian arm of the USEC. After Dous Novella, Old Earth was abandoned by the USEC, which moved its headquarters to New Earth, in the New Sol system.