Comments by "Paul Frederick" (@1pcfred) on "Brian Cox - Is The Universe Infinite?" video.

We know matter has not always existed. We know someday matter won't exist again. We are just living in a particular slice of time now where matter exists in our universe.
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What good is knowing any of this? We're never going to go 250 billion light years. So how does knowing it help us out any? Things you can't ever get to. It's like starving and looking into the window of a restaurant and you're broke.
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@pdj2995 that's not true at all. The conditions for complex life to evolve may be incredibly rare. So far we have a sample size of one so we just don't know. But this planet has a very unique set of conditions that made it possible for us to be here. Conditions that are not likely replicated many other places.
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Yeah well everyone needs a hobby.
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Well the whole universe is expanding but your living room isn't getting any further from your kitchen. We're still the same distance from our Sun as we've always been. The expansion isn't a local phenomena. Our galaxy isn't even getting any bigger. The galaxy closest to us is actually coming closer. It's supposed to hit in about 4 billion years. Exoplanets still remain very far away though. Today we're just trying to find them for curiosity sake. There's no practical way we could get to them. Even if they aren't getting further from us than they are now.
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Matter is energy. 13.77 billion years ago the whole universe was an infinitely small point of incredibly dense energy and it began to expand. Eventually it spread out enough it cooled sufficiently that matter could coalesce. It was a cloud of hydrogen gas that clumped up into gigantic stars which ignited and then exploded. Casting the building blocks of our world out into space. Which some 4.5 billion years ago accreted into our solar system. And here we are.
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@bobbyt223 you can stop at we don't know. Because we don't.
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The best estimate today is about 13.77 billion years ago. At least that's when inflation began. How long the energy existed before it began to inflate there's no way now we can know. Or where it came from. There's nothing we can observe from that time. The Universe was so dense light couldn't pass through it. There really wasn't anything making light either then.
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@lordzedd3297 Maybe there was no here before the Universe? At least not a here as we understand the word. We exist in sort of a pop up book. It's not really there until you open up the page. Well, it's there, just all folded up. So there'd be no room for us to exist until it is unfolded.
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13 billion years ago that galaxy was much closer to us than it is today. It sent light towards us while it moved away. But it really didn't move space just inflated. The distance between everything is growing.
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@anabananin9848 I'm saying the tracks between trains are getting longer. More track is appearing out of nothing. So trains resting on the tracks are getting further apart. We do not know how or why it is happening. We can only observe that it is happening. It isn't magical but it is certainly mysterious and has so far defied all attempts at explaining it.
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@anabananin9848 if space is not expanding then why is everything moving away from us? The present universe did not just wink into being at its present size. That's what we used to think. The whole God made the heavens and the Earth story. He waved his magic wand and everything simply appeared. Some discoveries made have cast doubt on that Creation story though. Such as our ability to see distant objects now and see they are red shifted. Everything was not lower in frequency in the past than it is today. That shift is caused by objects moving away very quickly. It is called the Doppler effect.
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@anabananin9848 there are different color stars. There could even be different color galaxies. But at some point you can't say everything is a different color. That's just not possible. Everything far away is red shifted. As far as galaxies colliding goes things do move in space as space expands. The space between us and Andromeda may not be expanding either. No one ever said the expansion was happening evenly everywhere. Nothing else in our universe is even. I don't think we've ever observed expansion directly. Only the effects of expansion. It is not a phenomena we completely understand. But expansion is the only thing that can explain what we can see. So we have to assume that's what's going on until we have evidence otherwise.
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@anabananin9848 galaxies are moving too. There's plenty of evidence galaxies have collided with each other often. We don't know where space is expanding. It's nothing we've ever seen.
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I tried to get you a gift but the mall was infinitely far away and receding faster than the speed of light.
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@pdj2995 explain why knowledge is synonymous with IQ?
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We know already how far the Webb can see. It's further than Hubble but it isn't all the way. We should still see things never before seen.
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@bad_actor1128 when you know the focal length and the magnification you have a pretty good idea what the instrument can do. All of that is known with Webb too. So we know precisely how far it can see already. We knew before it was even built.
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@sillybilly1662 fact is things are further apart than they had time to get to if they were just traveling at the speed of light. Which itself is strong evidence that the universe is expanding faster than the speed of light. Things aren't moving though space is expanding. It's like if you put two dots on a balloon and blew the balloon up. The dots would be the same place on the balloon but they'd get further apart. The balloon itself would stretch.
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@sillybilly1662 why would you think I would know what books or TV you've seen?
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Absolute zero is the end of our Universe but maybe it is the beginning of a new state? We do not exist in the energy state when the Universe was born today. There was no matter then at all. Someday when our Universe is spread so thin no subatomic particles interact with each other matter as we know it won't exist then either. So that'll be a new reality unlike our present reality.
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Space is nothing. So space can travel faster than the speed of light. Now where all of this space is coming from is a bit of a mystery.
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@Prrocess but it is not expanding at maximum speed because the rate of expansion is increasing. Things are moving faster.
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