Did you know? The Physics of our Cosmos has a certain limit: the speed of light in vacuum, 299,792 km It is considered a constant and indicated by the letter. It can not be exceeded. According to the famous equation of Albert Einstein in his theory of special relativity , in 1905, e=mc², energy and mass are equivalent entities and can transform into each other. The more the speed increases, the more energy is needed because energy is transformed into mass. Only Tachyons, if they existed, would b