Explore Einstein's Universe with Interactive Thought Experiments!
Time moves slower for objects moving near light speed! Try moving the spaceship:
At everyday speeds, time flows normally. But near light speed, time slows down!
Light always moves at the same speed, no matter how fast you're moving!
Whether you're moving toward light or away from it, it always passes you at 299,792 km/s!
Objects shrink in the direction they're moving when near light speed!
At everyday speeds, objects keep their normal size. But near light speed, they flatten like pancakes!