Is the universe expanding, or is everything in it getting smaller?
3103
How do we know the universe is expanding, and not that its contents are shrinking?
63346
How can the universe expand if there is gravitation?
75058
Why isn't an infinite, flat, nonexpanding universe filled with a uniform matter distribution a solution to Einstein's equation?
136212
How is the expansion of space itself explained in LQG?
117108
Is the Universe being dragged into a singularity rather than expanding?
73935
Why the temperature is getting lower when the universe is expanding
10553
Does the universe have an edge/boundary/barrier? If yes, what is at the edge?
62168
Hubble time, the age of the Universe and expansion rate
10377
Is redshift the only way by which we can tell that space is expanding?
112264
Cosmological constant doubts
105071
Is the distance between the Sun and the Earth increasing?
99374
Can we observe an edge of the universe?
82440
As the universe ages, will we see more stars or less?
56753
Is it possible that galaxies' redshift is caused by something else than the expansion of space?
20511
Is it possible to experimentally show that observable universe is much larger than ~93B ly?
72416
The universe appears to have a lower bound in the time dimension, why not an upper bound?
21662
What was the density of the universe when it was only the size of our solar system?