Calculate distance of galaxy 13 billion years ago
5930
Why is the observable universe so big?
72072
How about an exact solution for the position of a planet as a function of time?
75651
How to calculate spatial distance in space-time?
97818
How do I find a previously discovered system?
85251
Tracking down an old sci-fi book
110021
extracting energy from cosmological expansion
42940
How do I calculate the distance of an object in a photo?
39778
Star Wars Time Measurement and Dating Systems
15724
Graviational Lensing Data
4132
What is the closest general-relativistic equivalent of a "time slice"?
15715
How can the Schwarzschild radius of the universe be 13.7 billion light years?
9646
How is Doppler redshift of distant galaxies established?
46510
Relativity and Galaxy Rotation Speed
6810
How to calculate "time ago" in Java?
108910
Age of the universe $ \equiv 1/H$?
131710
Evolutionary chronology - if any, which species have evolved in the last 100 years
31728
Galaxy rotation curve and dark matter