According to our current understanding of physics, it is not possible to travel faster than the speed of light in space. The theory of special relativity, proposed by Albert Einstein, states that the speed of light in a vacuum is the maximum speed at which information or matter can travel.
As an object with mass accelerates, its energy increases, and so does its mass. As the object's velocity approaches the speed of light, its mass becomes infinitely large, requiring an infinite amount of energy to continue accelerating. This means that it would take an infinite amount of energy to propel an object with mass to the speed of light, making it impossible to achieve or exceed this speed.
If it were somehow possible to travel faster than light, it would have profound consequences that defy our current understanding of physics. One consequence is the violation of causality, which is the principle that cause and effect should follow a chronological order. Faster-than-light travel could potentially allow for situations where an effect precedes its cause, leading to paradoxes and logical inconsistencies.
Additionally, as an object approaches the speed of light, time dilation occurs. Time would appear to slow down for the object in motion relative to an observer at rest. If an object were to exceed the speed of light, time dilation would become even more extreme, potentially causing time to run backward for certain observers. This violates the principle of a universal "arrow of time" and leads to further inconsistencies.
It's worth noting that while faster-than-light travel is currently considered impossible, scientific theories are always subject to revision as new discoveries and insights emerge. However, at present, our understanding of physics does not provide a feasible mechanism for exceeding the speed of light.