/sci/ - Science & Math

>>15372155
they're moving less than the speed of light locally, but are moving away from us at more than the speed of light. Because it's the actual space that's expanding, the further two things are apart the faster they're moving apart relative to eachother. Picrel sort of shows it using rising rasin bread as an analogy where the rasins would be various galaxies and the bread is space, its from here
https://en.wikipedia.org/wiki/Expansion_of_the_universe#Effects_of_expansion_on_small_scales

The inflation affects everything though. Galaxies and other celestial bodies not bound by gravity are being stretched apart. But the gravity between the sun and the moon, or the chemical bonds holding the atoms of your body together, is much stronger than inflation. At some point in the future if the inflation keeps speeding up then it will rip apart everything including all ordinary matter
https://en.wikipedia.org/wiki/Big_Rip

>>15372155
they moving less than the speed of light locally, but are moving away from us at more than the speed of light. Because it's the actual space that's expanding, the further two things are apart the faster they're moving apart relative to eachother. Picrel sort of shows it using rising rasin bread as an analogy where the rasins would be various galaxies and the bread is space, its from here
https://en.wikipedia.org/wiki/Expansion_of_the_universe#Effects_of_expansion_on_small_scales

The inflation affects everything though. Galaxies and other celestial bodies not bound by gravity are being stretched apart. But the gravity between the sun and the moon, or the chemical bonds holding the atoms of your body together, is much stronger than inflation. At some point in the future if the inflation keeps speeding up then it will rip apart everything including all ordinary matter
https://en.wikipedia.org/wiki/Big_Rip

>>15142811
You have to understand that the Universe is everything, so you can't exactly see it like a regular geometrical object. To have a center, you need boundaries and all objects need to recede from said center. But this is not true in the Universe, since it is homogeneous (cosmological principle) and all visible galaxies appear to recede from your position regardless of where you are. Meaning that a same galaxy can appear to move in two different directions depending on where you observe it from.
You also have to understand that the Universe's expansion is not expansion in a traditional way, it is the scale of the Universe which is changing overtime: all objects are moving away from each other (see gif related for an analogy).

>>9205323
"Imagine that the expanding Universe is a loaf of raisin bread. When baked in the oven, the bread expands, but the raisins do not. The bread represents the space in the Universe, and the raisins represent galaxies and other astronomical objects. While the bread itself undergoes a large change in structure, the raisins themselves stay the same."

It's expanding infinitely, not infinite itself, but it's expanding faster or at the speed of light i think i dont remember.

>>5595753
That makes no sense. What are you even trying to say?
If light changes speed, that doesn't mean it's hit an edge. Like how a car can slow down without having to crash.
Also, here's a picture of metric expansion of space, for those who were arguing about it,

does metric expansion of space imply that molecules and atoms are constantly working against a force that tries to tear them apart?