<Table> Speed of light <Tr> <Td_colspan="2"> Sunlight takes about 8 minutes 17 seconds to travel the average distance from the surface of the Sun to the Earth . </Td> </Tr> <Tr> <Th_colspan="2"> Exact values </Th> </Tr> <Tr> <Th> metres per second </Th> <Td> 7008299792458000000 ♠ 299 792 458 </Td> </Tr> <Tr> <Th> Planck length per Planck time (i.e., Planck units) </Th> <Td> </Td> </Tr> <Tr> <Th_colspan="2"> Approximate values (to three significant digits) </Th> </Tr> <Tr> <Th> kilometres per hour </Th> <Td> 7003108000000000000 ♠ 1080 million (7009108000000000000 ♠ 1.08 × 10) </Td> </Tr> <Tr> <Th> miles per second </Th> <Td> 7005186000000000000 ♠ 186 000 </Td> </Tr> <Tr> <Th> miles per hour </Th> <Td> 671 million (7008671000000000000 ♠ 6.71 × 10) </Td> </Tr> <Tr> <Th> astronomical units per day </Th> <Td> 173 </Td> </Tr> <Tr> <Th> parsecs per year </Th> <Td> 0.307 </Td> </Tr> <Tr> <Th_colspan="2"> Approximate light signal travel times </Th> </Tr> <Tr> <Th> Distance </Th> <Td> Time </Td> </Tr> <Tr> <Th> one foot </Th> <Td> 1.0 ns </Td> </Tr> <Tr> <Th> one metre </Th> <Td> 3.3 ns </Td> </Tr> <Tr> <Th> from geostationary orbit to Earth </Th> <Td> 119 ms </Td> </Tr> <Tr> <Th> the length of Earth's equator </Th> <Td> 134 ms </Td> </Tr> <Tr> <Th> from Moon to Earth </Th> <Td> 1.3 s </Td> </Tr> <Tr> <Th> from Sun to Earth (1 AU) </Th> <Td> 8.3 min </Td> </Tr> <Tr> <Th> one light year </Th> <Td> 1.0 year </Td> </Tr> <Tr> <Th> one parsec </Th> <Td> 3.26 years </Td> </Tr> <Tr> <Th> from nearest star to Sun (1.3 pc) </Th> <Td> 4.2 years </Td> </Tr> <Tr> <Th> from the nearest galaxy (the Canis Major Dwarf Galaxy) to Earth </Th> <Td> 7011788940000000000 ♠ 25 000 years </Td> </Tr> <Tr> <Th> across the Milky Way </Th> <Td> 7012315576000000000 ♠ 100 000 years </Td> </Tr> <Tr> <Th> from the Andromeda Galaxy to Earth </Th> <Td> 2.5 million years </Td> </Tr> <Tr> <Th> from Earth to the edge of the observable universe </Th> <Td> 46.5 billion years </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Sunlight takes about 8 minutes 17 seconds to travel the average distance from the surface of the Sun to the Earth . </Td> </Tr>

What is the speed in miles per second of a beam of light traveling at