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Results tagged with gravity
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user 21871
Gravity is an attractive force that affects and is affected by all mass and - in general relativity - energy, pressure, and stress. Prefer newtonian-gravity or general-relativity if sensible.
-2
votes
1
answer
91
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When/Where will the planets colide?
Given N bodies of known position, mass, speed and direction, if they were to collide, where it will happen and when?
PS: this is not a homework... im working on a physics simulation engine...
EDIT …
- 315
3
votes
2
answers
124
views
Will two perpendicular orbits settle into a disc?
Scenario:
one "fixed" object (like the sun...) of mass X
two "planets" (P1 and P2) of mass Y
P1's orbit is perpendicular to P2's orbit, and the sun is the center of both orbits
P1 and P2 will never …
- 315
1
vote
1
answer
136
views
Are galaxies "disk" shaped?
When you look a sphere from a fixed observation point, you can easily mistake it for a circle, so I was wondering: are galaxies really "disk" shaped or we just don't have the means to detect the "$z$- …
- 315
0
votes
0
answers
76
views
Star vs Blackhole - Accretion Disk
Simple question: can we prove that what we call today a "star" is not a accretion disk of a "tiny" black hole that happens to rotate in all the 3 axis?
- 315
3
votes
1
answer
253
views
Light trajectory
We have observed stars where "we should not"
Some people say that gravity can alter light trajectory.
Some people say that gravity actually alter the space on which light travels. …
- 315