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 the expansion of the universe emits light toward us which initially you know because the light was emitted from this object going faster 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 NUMBER_TOKEN. this one's moving NUMBER_TOKEN. 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 does that make sense the light does this crazy path where like almost like a boomerang it's 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 no it doesn't make sense but it's cr so as light gets closer to us it starts moving faster and faster relative to us there are galaxies that are outside of what we call the event horizon the cosmic event horizon isn't and outside of that all the galaxies and stars outside of that we'll never be able to contact them they'll never be able to send light to us and the hubble sphere the edge of it is the event horizon no those are actually two different things the hubble sphere is inside that everything's moving less than the speed of light event horizon is everything that we can see there's actually a boundary between those two it's like a shell between those two stuff that's moving away from us faster the speed of light but the light being emitted from those things now will eventually get to us that's what's inside that shell it's like this magical shell and our hubble sphere is also expanding more light is coming inside of our sphere of things that are moving away from away from us faster than the speed of light because the universe is expanding but since the universe is expanding then light can be emitted from a galaxy initially like this is so nuts but the light will move away from us to start and then eventually stop and then start coming toward us relative to us which seems like that's violating relativity but it's not because it's moving through space still at the speed of light because space is expanding do objects get bigger when the universe expands great question um objects do not get bigger no actually so things can be easily pushed and pulled through space it's almost like they had like space has no friction i can easily pull you toward me i won't because i like this camera like i'm overcoming i don't know space so easily gravity overcomes the expansion of space up until you get to something like a hundred million light years so
NO_SEGMENT_TOKEN