(August 10, 2017 at 6:37 am)Rhondazvous Wrote: I understand about the rubber band/raisin bread dough analogies. My question is what made scientists look at the universe and say hey, you know what, the galaxies aren't moving. Space is expanding. What tipped them off to make this distinction?
It is really not that hard to understand, it is not that different than knowing your car speed can be measured by time and distance.
Maybe this will help. And others can correct me if my analogy is wrong, but the way I understand it expansion can be explained more like inflating a balloon with a fast air tank, if you have ever seen that.
A easy book for laypeople, and I am currently reading it, and yes, it will blow your mind, Neil Degrasse Tyson, "Astrophysics, For People In a Hurry".
Lets just say expansion is "FUCKING FAST".
But here is a wiki article on space expansion.
https://en.wikipedia.org/wiki/Inflation_(cosmology)
