Albert Einstein's theories of relativity have long suggested that it is impossible to reach or exceed the speed of light, which is a requirement for any journey measured in light-years. According to the theory of general relativity, space and time are merged and nothing can travel faster than the speed of light. This theory also explains how mass and energy warp space-time, with heavy objects such as stars and black holes curving space-time around them. This curvature is what we experience as gravity, and is why many space adventurers worry about “getting stuck” or “falling into a gravity pit”.Early science fiction writers John Campbell and Asimov saw this deformation as a way to circumvent the speed limit.
Instead of traveling faster than light, they proposed creating a shortcut between two points in space. This has been observed in statistical studies of muons that travel far beyond c times their half-life (at rest), if they travel close to c. Gerald Cleaver and Richard Obousy, professor and student at Baylor University, theorized that manipulating the extraspatial dimensions of string theory around a spaceship with an extremely large amount of energy would create a bubble that could cause the ship to travel faster than the speed of light. As in the case of Albierre's propulsion, travelers moving through the wormhole would not move locally faster than the light traveling through the wormhole next to them, but could reach their destination (and return to their initial location) faster than light traveling outside the wormhole. Since nothing is just empty or empty space, it can expand faster than the speed of light, since no material object breaks the light barrier. It turns out that there are theoretical ways in which we can travel faster than light.
This can approach twice the speed of light, as in the case of two particles traveling at a speed close to that of light in opposite directions with respect to the frame of reference. Wormholes are, in theory, tunnels that connect two points in space that could be many light-years apart, but traveling through one of them would be instantaneous. Solitons could also travel faster than light and “create a conductive plasma and classic electromagnetic fields”.The phase velocity of an electromagnetic wave, when traveling through a medium, can routinely exceed c, the vacuum speed of light. In many science fiction works, such as Star Wars or Star Trek, it is possible to travel faster than light thanks to the use of hypermotors.
General relativity also recognizes that any means of travel faster than light could also be used to travel through time. If they then returned to Earth, the traveler would arrive on Earth thousands of years in the future.