Why does matter gather as discs around massive objects?
46411
Why are our planets in the solar system all on the same disc/plane/layer?
66232
At what moment will matter falling into a black hole affect its size?
109872
How would neutron matter appear to the naked eye?
93552
How can the centripetal force lead to objects flying apart?
121231
How does gravity cause nuclear fusion in stars?
7860
Why do floating water drops form spheres?
53434
Units in gravitational $N$ body simulations
5930
Why is the observable universe so big?
92591
Could a Dyson Sphere-like object be made to encase a black hole without collapsing?
35463
How come the universe is made of matter and not antimatter?
48899
Is it possible to create matter?
41993
Why are stars, planets and larger moons (approximately) spherical in shape (like, the Sun, the Moon, the Earth, and other planets)?
60687
Solid objects inside the event horizon - can they remain "solid"?
116137
Particle speed and density
75939
Can matter really fall through an event horizon?
74770
Is Dark Matter called "Matter" only because of gravity?
31618
Why do objects appear smaller when farther away?