How Fast Is Lightspeed?


Quick Answer

Lightspeed, or the speed of light, is 186,282 miles per second in a vacuum. Traveling at this speed would allow a person to circle the earth at the equator approximately 7.5 times in one second.

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Full Answer

Currently, nothing can travel as fast as light. In terms of miles per hour, light travels about 670,616,629 miles per hour. Before there were instruments with the ability to measure lightspeed, light was thought to move instantaneously. Lightspeed is a limit that theoretically cannot be achieved by anything with mass. This limit, however, has not stopped mankind from imagining the possibility of traveling faster than the speed of light.

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