1. The Science of Time Dilation
At the heart of relativity lies a mind-bending idea: time isn’t absolute. According to Einstein, the faster an object moves, the slower time ticks for it compared to a stationary observer. This phenomenon, called time dilation, has been confirmed through countless experiments and is especially noticeable at speeds approaching light. For astronauts hurtling through space, this means their onboard clocks run just a bit slower than those on Earth. Learn more at NASA.