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| Thread ID: 150450 | 2022-01-31 17:28:00 | Stars in the Universe | Bryan (147) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1484015 | 2022-01-31 17:28:00 | scitechdaily.com | Bryan (147) | ||
| 1484016 | 2022-01-31 19:43:00 | 200 sextillion. Wow, even if it's estimated. And one galaxy, one solar system within that, one planet and one recent species, many think it was all about them. LOL!!! The arrogance. |
piroska (17583) | ||
| 1484017 | 2022-01-31 19:48:00 | scitechdaily.com how many stars ? you cant count what you cant see. many galaxies are so far away , that their light will never reach us because of the expansion of the universe www.space.com "I don't know [the answer] because I don't know if the universe is infinitely large or not," |
1101 (13337) | ||
| 1484018 | 2022-01-31 20:43:00 | Einstein said "the universe is boundless but not infinite". As I understand it, the Universe is made up of approximately 100 billion galaxies each containing 100 billion stars, approximately. In the current theory of the 'Big Bang' we know the approximate start point in time, approx, 10 to power of 14 years ago and our very latest working telescope, allows us to see galaxies at the edge of that, or close to the beginning of the big bang. The James Webb will give us even more precision to see very far back in time, close to the beginning of the big bang. 100, billion grains of sand fills an Olympic swimming pool apparently, to help with visualisation. There is more distance between stars in a galaxy proportionately than there is between galaxies, in a size comparison. An average galaxy is about 100,000 light years across. |
zqwerty (97) | ||
| 1484019 | 2022-01-31 23:17:00 | Or, as Douglas Adams put it: “Space,” it says, “is big. Really big. You just won’t believe how vastly, hugely, mindbogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.” |
MushHead (10626) | ||
| 1484020 | 2022-01-31 23:48:00 | Or, as Douglas Adams put it: “Space,” it says, “is big. Really big. You just won’t believe how vastly, hugely, mindbogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.” Read the book. Listened to the radio show. Watched the TV series. Loved the improbability drive. "I'm not boring you, am I?" - Marvin the paranoid android.:waughh: Absolutely brilliant. Pommy comedy at it's best. :banana The Yanks just have no idea.:rolleyes: |
Roscoe (6288) | ||
| 1484021 | 2022-01-31 23:52:00 | The Yanks just have no idea.:rolleyes: True, but The Big Bang Theory could be the closest they ever got to proper humour. |
allblack (6574) | ||
| 1484022 | 2022-02-01 00:23:00 | It says: Before calculating the number of stars in the universe, astronomers first have to estimate the number of galaxies. To do that, they take very detailed pictures of small parts of the sky and count all the galaxies they see in those pictures. That number is then multiplied by the number of pictures needed to photograph the whole sky. The answer: There are approximately 2,000,000,000,000 galaxies in the universe – that’s 2 trillion. Astronomers don’t know exactly how many stars are in each of those 2 trillion galaxies. Red, white and blue stars give off different amounts of light. By measuring that starlight – specifically, its color and brightness – astronomers can estimate how many stars our galaxy holds. With that method, they discovered the Milky Way has about 100 billion stars – 100,000,000,000. Now the next step. Using the Milky Way as our model, we can multiply the number of stars in a typical galaxy (100 billion) by the number of galaxies in the universe (2 trillion). The answer is an absolutely astounding number. There are approximately 200 billion trillion stars in the universe. Or, to put it another way, 200 sextillion. That’s 200,000,000,000,000,000,000,000! Yes an estimate, or a not bad guess, they didn't just make it up |
piroska (17583) | ||
| 1484023 | 2022-02-01 00:29:00 | Einstein said "the universe is boundless but not infinite" . He also refused to believe the universe could be expanding (or contracting) and fudged his equations because of it . And refused to believe in Quantum Physics principles . He was a man of his time , and that time was early 1900's . Truth is, no one knows , because we can only see a small part of the universe . "very latest working telescope, allows us to see galaxies at the edge of that, or close to the beginning of the big bang" Thats not how it works . The light from stars at the 'edge' of the universe hasnt reached us, and will NEVER reach us . A better telescope cant see light from stars who's light hasnt reached us yet , being so far away . The expansion of the universe means we'll never see those most distant stars light . We can see the cosmic radiation background, from near the beginning of time . But only that part of it that was close ish to us (close being many many billions of miles) . Its taken that very early radiation, from near the beginning of time, that long to get here . ie 14 billion years |
1101 (13337) | ||
| 1484024 | 2022-02-01 08:31:00 | You are writing as if the Universe is some sort of magical place which it is not. Lots of theory to predict the amount of matter from scratch not by observation. Boundless but not infinite is another way of saying that, the cosmological constant was a mistake that Einstein made because he was trying to make his equations match a steady state universe, he said it was his biggest blunder but in no way eradicates all the work he did, ie theory of relativity and special theory of relativity. Mankind understands much about the Universe and how it came about but not why or what its final state will be especially since latest observations show the expansion is speeding up which makes no sense. If it's a one shot Universe then it means that God made it which is ridiculous. It has to be a continuous process which is repeating forever. It can't be solid nothing and it can't be solid everything because either is a completely predictable state and that violates the Uncertainty Principle which is derived mathematically and is known to be correct. The state of the Universe is somewhere in the middle of nothing and everything and what we see around us is what that condition looks like. |
zqwerty (97) | ||
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