...you pass through it unscathed? As a human-being approaching earth at the speed of light, could you pass directly through the center of the earth and exit the other side without a scratch? What would happen?
You would evaporate before you got through the atmosphere.
First of all you cant go the speed of light, but for the sake of argument lets say you are.
Think of jumping 200 feet into water, at that height/speed the water is similar to concrete. Although air is not as dense as water you are more than making up for it by going at that speed.
