3 ms·
Space is expanding everywhere, but the matter that resides within it is bonded to other matter, or gravitationaly attracted together, so it holds. Back to the
by function_seven 8y ago
Space is expanding everywhere, but the matter that resides within it is bonded to other matter, or gravitationaly attracted together, so it holds.
Back to the balloon analogy, the surface of the balloon is expanding, even under the ant's feet. But the ant doesn't grow.
- acqq 8y agoAnd since the even the whole groups of galaxies are gravitationally bound, it seems that the galaxies, including our own galaxy, are not "stretching" but remain the same size. And, based on the same principle, everything inside of them also, including us. So back to the cupcake analogy, the raisins are the whole galaxy groups. Also: https://medium.com/starts-with-a-bang/this-is-why-we-arent-expanding-even-if-the-universe-is-d8c770531082 https://medium.com/starts-with-a-bang/this-is-why-we-arent-e... "As physicist Richard Price once put it, “Your waistline may be spreading, but you can’t blame it on the expansion of the universe.”" https://www.newscientist.com/article/dn8082-cosmic-expansion-is-not-to-blame-for-expanding-waistlines/ https://www.newscientist.com/article/dn8082-cosmic-expansion... https://arxiv.org/abs/gr-qc/0508052 https://arxiv.org/abs/gr-qc/0508052
- caf 8y agoHere "bonded to other matter" means "electrostatically attracted together".