4 ms·
Imagine a deflated baloon with two dots drawn close to each other. Now inflate it; the dots didn't move but the plane that they were drawn/positioned on did.
by tvshtr 3y ago
Imagine a deflated baloon with two dots drawn close to each other. Now inflate it; the dots didn't move but the plane that they were drawn/positioned on did.
- munksbeer 3y agoI understand that concept. I'm asking, how can you materially tell the difference?
- thehappypm 3y agoNobody can answer because nobody knows
- DrFalkyn 3y agoI think it has to do with the observation that no matter in which directinn we look, galaxies are moving away. Its not like we look towards one direction and say, "aha, that must be the center of the universe". Its the same story in ALL directions - we wee galaxies moving away from us at increasing velocity.
- codethief 3y agoHere is one difference: The "velocities" suggested by an expansion of space can be well above the speed of light whereas classical velocities cannot. https://bigthink.com/starts-with-a-bang/universe-speed-of-light/ https://bigthink.com/starts-with-a-bang/universe-speed-of-li...