<Table> <Tr> <Th_colspan="2"> Supreme Court of the United States </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Established </Th> <Td> March 4, 1789 (228 years ago) (1789 - 03 - 04) </Td> </Tr> <Tr> <Th> Country </Th> <Td> United States </Td> </Tr> <Tr> <Th> Location </Th> <Td> Washington, D.C., United States </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 38 ° 53 ′ 26" N 77 ° 00 ′ 16" W ﻿ / ﻿ 38.89056 ° N 77.00444 ° W ﻿ / 38.89056; - 77.00444 Coordinates: 38 ° 53 ′ 26" N 77 ° 00 ′ 16" W ﻿ / ﻿ 38.89056 ° N 77.00444 ° W ﻿ / 38.89056; - 77.00444 </Td> </Tr> <Tr> <Th> Composition method </Th> <Td> Presidential nomination with Senate confirmation </Td> </Tr> <Tr> <Th> Authorized by </Th> <Td> United States Constitution </Td> </Tr> <Tr> <Th> Judge term length </Th> <Td> Life tenure </Td> </Tr> <Tr> <Th> No. of positions </Th> <Td> 9, by statute </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.supremecourt.gov </Td> </Tr> <Tr> <Th_colspan="2"> Chief Justice of the United States </Th> </Tr> <Tr> <Th> Currently </Th> <Td> John Roberts </Td> </Tr> <Tr> <Th> Since </Th> <Td> September 29, 2005 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Supreme Court of the United States </Th> </Tr>

What is the term of office for the supreme court