Limits of the Universe: how can be sure about the size of unobservable Universe?
101201
How do we know the size of the universe?
3103
How do we know the universe is expanding, and not that its contents are shrinking?
17789
How can I "normalize" the scale of what seems to be either an infinitely large or infinitely small object
1876
Is the sensitivity of the LIGO sensitive enough to measure the "expansion of the universe"? What specifically is the numerical ratio of effects?
63748
What does it mean that the universe is "infinite"?
99374
Can we observe an edge of the universe?
21084
Size of the universe
69667
What is the equation for the scale factor of the universe, a(t), for the best fit of data to the $\Lambda CDM$ Model of Cosmology?
130124
Is it possible to learn about an event that occurred outside of your observable universe?
56103
Is the universe finite or infinite?
98769
Find a universe and a predicate that satisfy the following formula
53889
What is the size of void?
105865
The twin paradox and positively curved space
124048
Is the Planck length the smallest length that exists in the universe or is it the smallest length that can be observed?
20511
Is it possible to experimentally show that observable universe is much larger than ~93B ly?
47082
If spacetime itself is expanding, how could we ever tell?
43888
Age of universe?