[RadioAstronomer]

The speed of light actually changes every year,IE they get a better estimation of the speed.Is this true?

False. The speed of light in a vacuum travels EXACTLY at 299,792,458 meters per second.

[boris]

"False. The speed of light in a vacuum travels EXACTLY at 299,792,458 meters per second."

I always thought we should redefine either the meter or the second to make it come out even: 3x10^8...

--Boris