According to our current understanding of physics, it is not possible for an object with mass to travel faster than the speed of light in a vacuum. As described by Einstein's theory of relativity, the speed of light in a vacuum, denoted by 'c,' represents an upper limit on the speed at which information and matter can travel.
If we assume a hypothetical spacecraft that could somehow surpass the speed of light, it would encounter several challenges. Firstly, as an object approaches the speed of light, its mass would increase according to relativistic effects, making it increasingly difficult to accelerate further. Additionally, the energy required to propel an object faster than light would be astronomically high, likely beyond the capabilities of any known or theorized technology.
Furthermore, even if we disregard these limitations and consider a spacecraft that could travel faster than light, returning to Earth within a single day would still be implausible due to the vast distances involved in interstellar travel. The closest star system to our solar system, Alpha Centauri, is about 4.37 light-years away. This means that light from Alpha Centauri takes over four years to reach us. Traveling to such distant destinations would require immense travel times even at near-light speeds, let alone faster-than-light speeds.
At this point, it's important to note that the concept of traveling faster than light is purely speculative and falls outside the realm of our current scientific understanding. It remains a subject of exploration in science fiction, but it has not been realized or supported by scientific evidence.