Were more stellar objects part of our observable universe in the past?
82440
As the universe ages, will we see more stars or less?
3994
Is the observable region of the universe within the event horizon of a super-massive black hole?
2842
Photons from stars--how do they fill in such large angular distances?
54395
Is Poincare recurrence relevant to our universe?
110351
Is the universe really "fine-tuned for life"?
10362
Does the universe have a center?
152335
Calculate distance of galaxy 13 billion years ago
13223
Is it possible to have things orbit around us?
60364
Universe Expansion as an absolute time reference
95674
Expansion of the Universe, will light from some galaxies never reach us?
4087
Did spacetime start with the Big bang?
84229
Why the galaxies form 2D planes (or spiral-like) instead of 3D balls (or spherical-like)?
149430
Why does the universe exhibit three large-scale spatial dimensions?
117108
Is the Universe being dragged into a singularity rather than expanding?
32061
Why isn't the center of the galaxy "younger" than the outer parts?
73729
Calculating the age of the Universe now and 30 billion years from now
123545
How Are Galaxies Receding Faster Than Light Visible To Observers?