Everything is always moving though “spacetime” at the cosmic speed limit (or “speed of light”). Imagine driving a car at 50 mph north. Now the road turns and is heading northwest. You’re still going 50mph, but you’re not going 50 mph north. Think of time is another dimension, so just like East-West is perpendicular to North-South, time is perpendicular to all three spacial dimensions. Since everything travels at a constant speed, the faster you move through space, the slower you move through time. Photons, or particles of light, actually don’t age at all because they travel at the cosmic speed limit through space.
I made a more detailed video about Special Relativity if you’re interested: [https://youtu.be/y4JvayFQKD8](https://youtu.be/y4JvayFQKD8)
Latest Answers