ELI5: Explain Like I'm 5

Superluminal motion

Ok kiddo, have you ever seen a car drive past you really fast? It looks like it’s going super fast, right? Well, what if I told you that some things in space can look like they are moving even faster than that?

When we look up at the sky, we can see stars and other objects that are really far away. But because they are so far away, they look like they’re not moving at all. However, scientists have found some objects that seem to be moving faster than the speed of light. This is called superluminal motion.

But wait, you might be asking, isn’t the speed of light the fastest anything can go? That’s true, but when we see superluminal motion, it’s actually just an optical illusion. It’s like when you’re in a car and you see things outside moving really fast, but it’s actually just because you’re going fast and they’re not.

Superluminal motion happens when we look at objects in space that are shooting out jets of gas or light. These jets can be moving really fast, almost as fast as the speed of light. But they’re not actually going faster than light, they just look like it because they are moving towards us at an angle.

It’s like if you’re looking at a train head-on as it starts to move. The front of the train will look like it’s moving really fast, even though the rest of the train is moving at a normal speed.

So, superluminal motion might sound like objects are breaking the laws of physics by going faster than the speed of light, but it’s really just an illusion caused by the angle at which we are viewing them. Pretty cool, huh?