NASA's stance on faster-than-light (FTL) travel is that it remains a theoretical concept. According to the principles of Einstein's theory of relativity, which has been extensively tested and verified through numerous experiments, the speed of light in a vacuum, denoted by 'c,' is considered to be the ultimate speed limit in the universe.
FTL travel, which would involve moving faster than the speed of light, poses significant challenges and currently falls outside the realm of our understanding of physics. While there have been speculative theories and ideas about wormholes, warp drives, and other hypothetical concepts that might enable FTL travel, none have been experimentally proven or shown to be feasible with our current technology.
NASA, being a space agency at the forefront of space exploration and research, focuses on more practical and achievable goals based on our current understanding of physics. This includes advancements in propulsion systems, spacecraft technologies, space missions, and scientific research to explore our solar system and beyond within the framework of known physics.
However, it's essential to note that the field of physics is continuously evolving, and new discoveries and breakthroughs could potentially change our understanding of the universe, including the possibility of FTL travel. For now, FTL remains speculative and not a part of NASA's current mission objectives.