According to our current understanding of physics, objects that move faster than light are not possible. The theory of relativity, proposed by Albert Einstein, states that the speed of light in a vacuum is the ultimate speed limit in the universe. As an object with mass approaches the speed of light, its energy requirements become infinite. Therefore, it is not possible for any object, including information or particles, to exceed the speed of light.
If we assume, for the sake of speculation, that an object could somehow move faster than light, it would violate causality, which is the principle that cause and effect relationships cannot be reversed. This violation would lead to logical paradoxes, such as the possibility of sending information back in time to change events that have already occurred.
To prevent such paradoxes, various theories, such as the Novikov self-consistency principle, propose that if an object were to travel faster than light, the laws of physics would conspire to prevent it from changing events in the past. This concept suggests that the object's actions would already be accounted for in the timeline, ensuring that cause and effect relationships remain consistent.
However, it's important to note that the idea of objects traveling faster than light is purely speculative and not supported by current scientific understanding. Our understanding of physics suggests that the speed of light is an insurmountable barrier, and the consequences of faster-than-light travel, including time travel, remain in the realm of science fiction.