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Showing posts from December, 2007

CNN: Space Shuttle traveled 18 times the speed of light

The CNN headline is not necessarily inaccurate because what we accept as the standard speed of light, 186,000 miles (300,000 kilometers) per second, is more of an average of the speeds of faster and slower lights.

Ordinary light, like what we typically get from the sun, typically sticks to the average speed of light. However, here in Boston it's overcast, so when the light hits the clouds it has to slow down considerably. When the light gets through the clouds it's slowed down, which is why things look grayer right now. On bright days, when there are no clouds to impede the light, it can come rushing right at the earth, and its speed makes it seem brighter. Brightness is relative to the speed of light, which is what the Theory of Relativity is all about. The Space Shuttle, flying on a cloudy day and over a part of the country without a lot of artificial light emanating from it, was flying relatively faster than the light in that area at that time. Since the light was that mu…