Timeline for Why haven't we seen the big bang?
Current License: CC BY-SA 3.0
15 events
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| Jun 23, 2015 at 22:14 | history | edited | Kyle Oman | CC BY-SA 3.0 |
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| Apr 24, 2015 at 16:15 | history | edited | Kyle Oman | CC BY-SA 3.0 |
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| Apr 24, 2015 at 8:43 | comment | added | DevSolar | @Bhavesh: It's important to keep in mind that "expansion of the universe" does not just mean "star A and star B moving further apart". It literally means that the universe between star A and star B is expanding as well. So the stars might actually flying towards each other at a given speed, but if they are far enough apart the expansion of space between them could result in their distance growing, effectively. | |
| Apr 24, 2015 at 2:27 | comment | added | Kyle Oman | @Bhavesh that's the idea, yes. The "sudden" doubling in size is not realistic, it is more gradual throughout the travel of the photon, but it's the same idea. The space already passed is growing behind the photon (of course so is the space ahead). | |
| Apr 24, 2015 at 1:54 | vote | accept | Bhavesh | ||
| Apr 24, 2015 at 1:51 | comment | added | Bhavesh | @HadrianEvan is it like when the photon reached B it was only 5 billion light years but suddenly it "stretched" and the distance was now 10 billion light years? And like when the photon goes back to A it would take 10 billion years for the photon from B to A right? | |
| Apr 23, 2015 at 18:07 | history | edited | Kyle Oman | CC BY-SA 3.0 |
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| Apr 23, 2015 at 18:04 | comment | added | Kyle | @Bhavesh The light only traveled 10 billion light years, but the point where the light originated is 15 billion light years away by the time the light from it has traveled that far. The intervening space expanded, making the distance larger. | |
| Apr 23, 2015 at 18:03 | comment | added | praeseo | @Bhavesh Simply put, imagine A and B are two points that are 5 billion light years apart. A photon travels from A to B in 5 billion years. But then the universe suddenly expands to twice it's size, the distance between A and B is now measured to be 10 billion light years. The light travelled from A to B (which we measure as 10 billion light years apart), taking only 5 billion years to do so. | |
| Apr 23, 2015 at 17:49 | review | Suggested edits | |||
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| Apr 23, 2015 at 17:46 | comment | added | Bhavesh | Kyle, i am sorry but this doesn't make any sense to me that light travlled a distace of 15 billion light years but travelled only 10 billion years?Hmmmm....sorry still didn't understood.... | |
| Apr 23, 2015 at 17:21 | comment | added | Kyle Oman | @Bhavesh hopefully that's clearer? | |
| Apr 23, 2015 at 17:21 | history | edited | Kyle Oman | CC BY-SA 3.0 |
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| Apr 23, 2015 at 17:18 | comment | added | Bhavesh | Kyle in your second paragraph you said that light travels 15 billion light years in 10 years, but i didn't get that and you said its because of relativity but there are many things in relativity and excatly what part of relativity are you talking about? Please edit your answer and explain me better of what you are talking about in second paragraph. Hope you give a better answer. :) | |
| Apr 23, 2015 at 16:37 | history | answered | Kyle Oman | CC BY-SA 3.0 |