Curisioty about universe
2253
If the universe is expanding, what is it expanding into?
68425
Electric charge neutrality of the Universe: evidences and theories
24003
Is the universe fundamentally deterministic?
111390
Size of Universe after inflation
10553
Does the universe have an edge/boundary/barrier? If yes, what is at the edge?
63748
What does it mean that the universe is "infinite"?
65001
Universe from nothing?
53450
What's the avarage temperature of the Universe?
110021
extracting energy from cosmological expansion
113304
Universe expands ... compared to what?
53434
Units in gravitational $N$ body simulations
54501
What is the entropy of the universe today?
3103
How do we know the universe is expanding, and not that its contents are shrinking?
25938
Before the Big Bang
52112
Dark matter and dark energy references
65985
How can the universe by infinite when it has known start and finite time since?
36381
earth; the earth