Galaxies Move Faster Than Light

Do you think that we can see things that are moving away from us faster than the speed of light? — It doesn't sound like we could. If something moves faster than the speed of light, we will never see it via light. — It's a good guess. I mean, that's like what you would intuitively think. Yes. — We'll never see that galaxy as it is. We'll only see it for how it was when it when the light left it. — Okay, you are right and wrong. — Cool. — Glad I came. There are some galaxies that are space is expanding them away from us fast enough that we will never see them as they are now. But there are some galaxies that are outside of our Hubble sphere. So meaning that they're moving away from us faster than the speed of light, but we will be able to see them as they are now. So they're emitting light now and it will get to us. This is crazy. You look confused. You should be. You're correct. Is okay. The galaxy's moving away from us faster than the speed of light. It emits light at us. And initially that light moves away from us, but it's traveling through space until it gets inside of our Hubble sphere and it's no longer moving away from us. Um, let me draw it. Here's us and then here's like shells of distance away from us. So imagine like this is the Hubble sphere. So this galaxy is moving away from us faster than the speed of light because of expansion of the universe. emits light toward us, which initially, you know, because the light was emitted from this object going faster than the speed of light, it's going to be moving away from us. So, the light's moving away, but it it's making its way slowly this way, even though this part is moving away from us. It's making its way slowly, and then eventually it's going to get to distances that are, think about it like this. So, remember how I talked about how consecutive distances or distances that are further and further away from us are moving faster and faster. So this right here is say moving I don't know 10. This one's moving 20. So as the light goes this way now it's going into space that's moving less and less fast away from us because the expansion rate of the universe or the Hubble parameter is slowing down which means that the stuff that's now at that first circle is not moving away from us as fast as the stuff that was there. The light does this crazy path where like you know almost like a boomerangs like it goes forward. Ignore this. Light emitted here goes forward away from us and then comes back toward us and eventually gets to us. Does that make sense? — Yeah. — No, it doesn't make sense, but it's