Why is space a vacuum? Also, why doesn't air from the Earth escape into space?
138161
Why is space a vacuum?
113249
Does time exist in a vacuum?
58089
What really goes on in a vacuum?
7332
Is the double-slit experiment typically carried out in a vacuum?
105369
Why does orbiting matter form an accretion disk?
14036
What is so special about speed of light in vacuum?
73673
What is gravity and what causes objects to act against it?
141215
What's the technical explanation for gravity to exist inside a spacecraft in science fiction?
130887
Can a negative charge ionize air?
20401
Why doesn't matter pass through other matter if atoms are 99.999% empty space?
42291
Why is spacetime curved by mass but not charge?
111891
The Earth is spinning, so why don't we jump and land on a different location?
38796
How come SG-1 couldn't get back to Earth?
32832
How do electromagnetic waves travel in a vacuum?
22168
What keeps mass from turning into energy?
3108
Why does space expansion not expand matter?
147803
Why does vacuum have a nonzero characteristic impedance towards electromagnetic radiation?