What do we mean by the size of the universe?
101201
How do we know the size of the universe?
108910
Age of the universe $ \equiv 1/H$?
5930
Why is the observable universe so big?
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?
67531
Universe being flat and why we can't see or access the space "behind" our universe plane?
37991
How many different sizes of infinity are there?
96689
What is the relationship between size of object with distance?
73937
What is meant when it is said that the universe is homogeneous and isotropic?
101157
What is the difference between "used space", "size" and "size on disk"?
83341
How can Planck units be consistent with conflicting dimensions of mass?
2253
If the universe is expanding, what is it expanding into?
85277
Does the age of the universe depend on the way it is defined?
24445
How can an infinite universe expand?
141736
What do we mean by the term "Number of things"?
96914
What does the size of the standard deviation mean?
43888
Age of universe?
113662
What does the 'cosmological constant' represent?