Is there a finite amount of mass in the universe?
63748
What does it mean that the universe is "infinite"?
10553
Does the universe have an edge/boundary/barrier? If yes, what is at the edge?
95004
Infinite Volume but Finite Surface Area
53259
Do photons have mass?
136281
Is the universe expanding, or is everything in it getting smaller?
98769
Find a universe and a predicate that satisfy the following formula
158808
Do photons have relativistic mass?
106211
Is the universe isomorphic to a universal turing machine?
33978
Is the Higgs boson not responsible for most mass?
79708
Is the energy density of vacuum uniform in the whole universe?
36000
Gravititonal fields compared to electromagnetic fields - are they infinite in range?
63346
How can the universe expand if there is gravitation?
89295
The interpretation of mass in quantum field theories
30745
Why can't photons have a mass?
152888
Schwarzschild Radius of the Universe
58404
Does vacuum (empty space) exist?
65473
How can something finite become infinite?