引力模拟的物质吸积

what we have here is a simulation created by Peter Cole encouraged in response to one of our computer science challenge just so how many particles might interact gravitationally and the whole point of the simulation is to get an intuition for how galaxies form why they have the structures they have why solar how solar systems form how they have the structures they have and and how gravity alone can kind of define that structure and what's really interesting about the simulation besides the fact that it's just mesmerizing and extremely cool it shows the particles collide once they get to a certain critical mass you see that they get colored yellow maybe to indicate that they are now a star fusion can now occur and you can zoom in at different levels to really see how the the different particles or the different masses are interacting and then you can actually rotate you can actually rotate that to see a little bit clearer this is if I'm looking kind of right on top of it to see how they're interacting and it's a three-dimensional simulation so it's a very rich it's a very rich way of thinking about these and what's exciting for me is the it's highly dependent on what the initial conditions are and an earlier version of Peters simulation he did not give a net angular momentum to the system and so you did not have as much of kind of the planet satellite or as much of the disk structures forming although right here we don't have too much of a distraction although it does seem to kind of there's there does seem to be a dominant plane in this scenario and what's exciting is here we have a binary system sometimes you you restart it you'd might not have a binary system depending on the initial conditions you might have something that starts to look like the Milky Way sometimes you might have something that looks very different than the Milky Way and it really gives us clues of why we see such diversity especially in and when we're looking at galaxies the structures of galaxies that it's highly dependent on initial conditions one can argue that our own solar system did have some net initial angular momentum because the current theory is it was it what really catalyzed it was a nearby supernova that sent a shockwave and allowed the dust that would form our solar system to reach a critical mass and start to condense into the Sun and the planets and so this isn't at least in my mind too unrealistic of a scenario and it's really cool to look at and it really gives you a sense of thing you you have a binary star there kind of orbiting around each other or reading around the center of mass which kind of looks like around each other and then this star right over here has its own kind of captive planet that is just rotating around it we can see it a little bit clearer if we had a very at least from this perspective a very close range we can zoom in a little bit more to see it a little bit better this has a satellite but then they're also kind of dancing around each other so it's a really fascinating a really fascinating simulation I could really stare at this and play with it for days and I encourage you to play with it restart it see how the initial conditions or what type of solar systems or galaxies you might end up with whether they form discs whether you have binary systems or not whether you have planets with satellites and then if you are more advanced to actually play with the code and see if you can really change the initial conditions the starting velocities of things the number of particles and things the distribution of mass that you start off with the angular momentum that you start off with and see how that might change the structure of the universe's that you create and I'm going to add an annotation to this video that links directly to this simulation and I'll also put the link inside of the description so have fun I could literally spend hours with this it's a fascinating fascinating module that he's created we zoom in and out and I really thank Peter Cole encouraged for this incredible contribution