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Sorry, can some explain the ‘universe is expanding’ concept? So far I thought it only meant that the space universe occupies is expanding, meaning the matter ke
by meteor333 7y ago
Sorry, can some explain the ‘universe is expanding’ concept? So far I thought it only meant that the space universe occupies is expanding, meaning the matter keeps going farther from its origin point, but I didn’t know the ‘fabric’ of the universe is expanding. I’m not able wrap my head around this concept. Can some please point me a resource that dumbs it down?
- fghtr 7y ago"The universe does not expand "into" anything and does not require space to exist "outside" it. Technically, neither space nor objects in space move. Instead it is the metric governing the size and geometry of spacetime itself that changes in scale." https://en.wikipedia.org/wiki/Expansion_of_the_universe https://en.wikipedia.org/wiki/Expansion_of_the_universe
- hcarvalhoalves 7y agoThis was confusing for me too. As time passes, the less the universe is made up of "something" (observable matter), so maybe a more accurate analogy would be saying the universe is "diluting" rather than "expanding"?
- Izkata 7y agoMy understanding is along the lines of, the surface of a balloon is the "fabric" of the universe: As the balloon is blown up it can expand and push things on it further apart, but the matter itself is always in the same place on the surface/in the universe (or moving slowly along the surface/in the universe). One big difference of course being the surface of a balloon is 2-dimensional, while space is 3-dimensional.