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Visual science, speed of light (23/40) The Aurora Borealis, or Northern Lights, caused when eruptions from the Sun stream into the Earth’s magnetic field, charged particles set out from the Sun at between 300,000 and 500,000 meters per second in all directions, but don't confuse that with the speed of light which is a lot quicker, around one thousand times faster, photons of light can only ever travel at the speed of light 300,000,000 meters per second in the vacuum of empty space, and a bit slower in our homes because they bump into molecules in the air!