How far are we from the "edge" of the universe?
10553
Does the universe have an edge/boundary/barrier? If yes, what is at the edge?
152130
Maximum size of the observable universe?
63748
What does it mean that the universe is "infinite"?
82440
As the universe ages, will we see more stars or less?
38764
bound on the cardinality of the continuum? I hope not
35597
How long would it take me to travel to a distant star?
117205
Expansion of the Universe: is new space(time?) being created or does it just get stretched?
53450
What's the avarage temperature of the Universe?
683
Do new universes form on the other side of black holes?
154529
Redshift and conformal time
41750
The age of the universe
72416
The universe appears to have a lower bound in the time dimension, why not an upper bound?
125620
How do we know for certain that space is expanding?
103041
How is wavelength actually related to space (/distance)?
58042
Redshifting of Light and the expansion of the universe
116989
Has the universe we live in started as a black hole that is imploding?
89322
What is the radius of the event horizon?