Speed Of Light: 299.792 Kilometers/Second   Light is an intriguing thing. No matter where it is, whether in empty space or close to huge planets and stars, it always moves at a constant speed of 299.792 kilometres per second. To better illustrate what this big number actually means in practical terms, we should take a look at some stunning statistics. Light takes 1.3 seconds to travel from the earth to the moon, and only 0.1333 seconds to circumnavigate the earth. If a particle accelerator was built all around the earth, the particles within that accelerator would circumnavigate the earth 7.5 times per second. This really shows that the speed at which light travels is simply inconceivable. It goes beyond our wildest imagination, and thinking about it will never fail to amaze us, and it makes us realize how small we really are.
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