Timeline for What were the dimensions of the universe during Planck epoch?
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| Oct 19, 2020 at 23:48 | comment | added | PM 2Ring | Saying that the scale was small doesn't necessarily imply that the spatial dimensions themselves of the whole universe were small. IMHO, that sentence from Wikipedia would be better if it used the term "scale factor". On a related note, see physics.stackexchange.com/a/136861/123208 | |
| Oct 19, 2020 at 4:51 | history | edited | Qmechanic♦ |
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| Oct 19, 2020 at 0:51 | answer | added | Buzz | timeline score: 3 | |
| Dec 20, 2013 at 14:03 | history | edited | Anixx | CC BY-SA 3.0 |
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| Dec 20, 2013 at 14:01 | comment | added | Kyle Kanos | The (visible) universe is currently approximately $10^{27}$ m in diameter. From supernova surveys, we know that the universe is accelerating its expansion. Extrapolate backwards for about 13.8 billion years and you get a diameter that is infinitesimal. | |
| Dec 20, 2013 at 13:58 | comment | added | Qmechanic♦ | Comment to the question (v1): It seems that OP is essentially pondering if the volume of 3-dimensional space is infinite or finite. Related: physics.stackexchange.com/q/9419/2451 and links therein. | |
| Dec 20, 2013 at 13:39 | history | asked | Anixx | CC BY-SA 3.0 |