How is distance between galaxies and rate of expansion of universe calculated?
51361
How does the Hubble parameter change with the age of the universe?
101201
How do we know the size of the universe?
15538
If the Universe is expanding, how is that galaxies run into each other?
54717
Is there a model relating GW signal and luminosity of the merger / burst?
124618
How can we know the time frames for events in the early universe?
20511
Is it possible to experimentally show that observable universe is much larger than ~93B ly?
119747
What is the meaning of the "expansion of space"?
10556
Can the Hubble constant be measured locally?
110021
extracting energy from cosmological expansion
145327
Why is "gravitational" red-shift neglected in galaxy and galaxy cluster scales?
73523
Shapes of galaxies
125620
How do we know for certain that space is expanding?
86328
What is the relative speed of two near-light speed particles headed towards each other?
113662
What does the 'cosmological constant' represent?
15715
How can the Schwarzschild radius of the universe be 13.7 billion light years?
2253
If the universe is expanding, what is it expanding into?
58042
Redshifting of Light and the expansion of the universe