Size of Visible Universe: Why now ~50Bly instead of 15?
5930
Why is the observable universe so big?
43888
Age of universe?
12267
(Almost) double light speed
54636
Dark Energy / Accelerating universe: naive question
17043
How does many worlds interpretation work for non-50/50 probabilities?
112264
Cosmological constant doubts
143235
Twin Paradox, calculating spacetime intervals from both perspectives
13080
Why is the cosmological constant a scalar?
64070
sample space and observational units
16777
Is there a limit to the resolving power of a mirror telescope?
53434
Units in gravitational $N$ body simulations
56103
Is the universe finite or infinite?
51901
Ambiguity in applying Newton's shell theorem in an infinite homogeneous universe
114934
Bootstrap Paradox in Interstellar
22682
If everything in the universe doubled in size overnight, would it be noticeable?
123545
How Are Galaxies Receding Faster Than Light Visible To Observers?
73729
Calculating the age of the Universe now and 30 billion years from now