What exactly is expanding when they say universe is expanding?
3108
Why does space expansion not expand matter?
56103
Is the universe finite or infinite?
5678
Rocket/Thrust/Gas/Free Expansion of Gas
96564
Is it valid to apply Einstein's Relativity to scenarios involving expansion of space?
70008
Virtual Particles real? Virtual particles create a universe?
144945
What is the evidence for Inflation of the early universe?
119747
What is the meaning of the "expansion of space"?
95295
Is the Universe Past-Eternal?
40291
What's the point of the axiom of extensionality?
29023
Is there an in universe explanation as to why the alternate universe is more advanced than ours?
123179
What's the true reason behind thermal expansion?
65985
How can the universe by infinite when it has known start and finite time since?
43888
Age of universe?
73937
What is meant when it is said that the universe is homogeneous and isotropic?
73935
Why the temperature is getting lower when the universe is expanding
98638
Is the Big Bang defined as before or after Inflation?
125620
How do we know for certain that space is expanding?