8000 (eight thousand) is the natural number following 7999 and preceding 8001. 8000 is the cube of 20, as well as the sum of four consecutive integers cubed, 11 + 12 + 13 + 14. The fourteen tallest mountains on Earth, which exceed 8000 meters in height, are sometimes referred to as eight-thousanders.
Sirius XM Radio, Inc. is the holding company for two satellite radio services operating in the United States and Canada, Sirius Satellite Radio and XM Satellite Radio. The two parent companies completed their merger (technically the acquisition of XM by Sirius) on July 29, 2008. On February 19, 2007, Sirius Satellite Radio and XM Satellite Radio announced a merger that would combine the two radio services and create a single satellite radio network in the United States.