According to our current understanding of physics, objects with mass cannot travel at or exceed the speed of light in a vacuum, which is approximately 299,792,458 meters per second (or about 186,282 miles per second). This is a fundamental principle of Albert Einstein's theory of relativity. As an object with mass approaches the speed of light, its relativistic mass increases, requiring more and more energy to accelerate it further. As an object with mass approaches the speed of light, its energ

Weighing Extremely Light Items