Gravity Simulation

Simulating gravity in unity
Music: • Space Ambient Mix 14 -...

[@Ing_Failure]

Really curious to see how, even though all object started at random position they arrange their orbits into a single direction

[@jorbitsgames]

It's probably that one direction wins, like a coin toss. I could try to make more simulations and see if it is a 50/50 chance.

[@howiestillgamez5326]

@@jorbitsgames Yeah, they will slowly pull the other particles in a direction which pulls more particles and then it just speeds up the pulling until most of them are going one direction.

[@basachternaam90]

Just like physics on earth, there is a resultant force on an object. It is the combined force of all forces that are influencing the object at a particular moment. It's basically the vector that tells you in what direction an object will go. When a gas cloud collapses into itself and produces a star with a planetary system, the matter comes from all directions. However, the gas was not evenly distributed, nor could it be. As a result there must be a direction of momentum that was more dominant than all else. Every particle had a direction, mass and velocity. A lot of them will have opposite directions and velocities, cancelling each other out by colliding with one another or gravitational pull. Eventually, only one direction of momentum will have had the highest impact. No matter how evenly distributed the gas was or how small the resultant force, with time the disc will become more regular and orderly, as this process is never ending. The resultant force not only tells you about the direction of the spin, but the orientation of the disc's axis as well. It applies to all celestial bodies I think.

[@tavhoyle]

Right?! The way the orbits stabilized so quickly has me going back to research relativity lol

[@syrathdouglas1244]

1:17 Smack

[@FloL00L]

hypnoticing af

[@avpruler]

Any way to download this?

[@johnlagerquist8227]

What integration scheme did you use?

[@jorbitsgames]

Sry, I don't really know what you mean. In Unity?

[@adomasjarmalavicius2808]

its just the newtons law probably , i made stuff like this myself, but it didint was successful.

[@NovaEngineer69]

WHAT IS THE GAME WHERE DO I DOWENLOAD IT PLS

[@thomaslemon7882]

It's closer to a whorl pool simulation, but close

[@jorbitsgames]

I think I increased the strength of gravity by about 100, otherwise it would've been too slow for an interesting video and everything would just collapse to one blob.

[@MadhawaSadil]

So this is how our solar system is made..

[@guillegeox]

Hermoso ❤❤❤

[@pocztowka2]

This is not even newtonian gravity :P angular momentum seems to come from nowhere and orbits are not elyptical lol :D

[@elweewutroone]

The angular momentum is from collisions and tides. The orbits are elliptical, but they precess because of gravitational interactions between the ‘moons’.

[@fatitankeris6327]

@@elweewutroone Some people believe to have rulers in their eyes and whole libraries in their head, coming to wrong assumptions...

[@jorbitsgames]

The video is from 2017 so I'm not entirely sure anymore, but I think I used newtons law for gravity. This simulation should serve as something cool to look at, rather then an actual scientific simulation and there are tons of reasons why it is not acurate. To name a few: - The real world is not 2D - I increased the strength of gravity by about 100, otherwise it would've been too slow for an interesting video - Physics Engines in Games are in no way perfect - Matter does not change form in this simulation - Heat is not simulated ...

[@stefanopetrone9900]

if the initial angular momentum of the system is 0 then in any time the angolar momentum will be 0, unless external forces (we need to know how collision work in this simulation). also in this simulation there are few particles that orbits in the other direction that escape from the screen, so it seems that all the particles are orbiting in the same direction, so we need to summ angular momentum of all particles (even ones out of screen) to claim that there is an angolar momentum out of nowhere. for the elliptical orbits well...some ellipses are very close to circles...like planets orbits

[@reedledabeetle]

@@jorbitsgames this is actually a surprisingly accurate simulation of the formation of planets and moons. It is good enough in fact that it shows how planets in solar systems all spin in the same direction. Great job with this, it's sick

[@Lou-li5mv]

hey, can I ask an eli5 question? in this Sim it looks like after a while of spinning around the large object, the small particles get closer and closer to the center until they merge with the large object. why don't the planets of the solar system do the same?

[@GermanTutorials]

Small numerical errors due to limited precision in floating point arithmetic when solving the differential equations underlying gravitational dynamics. ELI5: Computers can only approximate physics but only to a certain degree, because computers can only calculate with finite numbers (while physics is done analytically, meaning exact in this context)

[@Thatchannel69]

Because the sun Is 99.8% of the Mass of the solar sistem

[@Jonassoe]

Now do it again in 3D and see if the debris forms a disc

[@ellisd3165]

we all have ancestors that survived this