Questions tagged [n-body-simulations]
Questions regarding simulations for an n-body problem.
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Code/Package for multiple planet simulation
I want to do a quick study and some tests on the planet-star dynamics ( including the movement of the star). I'm looking for a code that simulates some planets orbiting a star. I've tried searching ...
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Peculiar Amplitude of Earth's Orbit in Z Axis
I'm currently building an N-body simulator for my masters project and I'm using JPL's Horizons system to compare against.
I started with just a couple orbits and everything seemed to be working ...
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Simulation and its necessity in astronomical research
I was wondering if mainly everything in Astronomical and Astrophysical was dependent on Simulations then what are the educational requirements are necessary to qualify as the Simulation Expert.
What ...
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how to calculate the half-mass radius and tidal radius of a (simulated) globular cluster
I am exploring a dataset of a direct N-body simulation of a star cluster, such that all particles have the same mass and
G = M = −4E = 1
for the whole cluster. The data available is the positions ...
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What is a thermal distribution of eccentricities?
The abstract of the new (open access) paper in Nature A statistical solution to the chaotic, non-hierarchical three-body problem says:
The three-body problem is arguably the oldest open question in ...
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Simulate earth, moon, sun constellation with dates
I would like to simulate the three object distance, specifically the distance of the moon to both, sun and earth for further investigation into tide prediction.
What would be a good starting point ...
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Difference between 3D real space and 3D redshift space?
With regards to cosmological simulations (e.g., N-body dark matter only simulations), I've seen people talk about the positions of objects (halos, galaxies) in the simulation in terms of 3D real space ...
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Are there any openly available simulators describing how planets form from protoplanetary disk?
Out of pure interest, I wonder whether there are existing open-source simulators that can simulate the formation of stars and planets from a protostar and the surrounding protoplanetary disk?
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More recent data and simulations of "Milkomeda", the collision of the Milky Way and Andromeda galaxies?
The Space.com headline Hubble Telescope Spots Two Galaxies in a Doomed (but Dazzling) Dance; The galaxies will ultimately crash into each other was probably overstated as seems to be policy in some ...
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Three Body Problem
I tried to solve the three body problem numerically.
While after 1000 time steps the system looks stable (See Fig.1)
it is completely unstable after 10000 time steps (See Fig.2).
Is that an intrinsic ...
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Astronomy/Astrophysics Project With C++/C/Python [closed]
I am a Computer Science Engineering student, in the 1st year of college. I'm insanely interested in making a project regarding astronomy/astrophysics but I don't know where to begin from. I know C, C++...
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Energy conservation in Barnes-Hut algorithm [closed]
I wrote a code that follows the Barnes-Hut algorithm for gravitational dynamics. Everything looks pretty good, except that when I plot the total energy $$E_{tot}\equiv E_k+E_u=const$$ I get this ...
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Is a General Relativity approximation available in Universe Sandbox (1 or 2)?
This answer points out that including General Relativity in a simulation can be computationally intensive and may not be present in Universe Sandbox.
However, answers to How to calculate the planets ...
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Universe Sandbox 2 accurate representation of gravity
I've been playing Universe Sandbox for a while now and I have never been able to make a near Earth asteroid collide with it. By "make" I mean, simulating billions of years of known, near Earth objects ...
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Trisolar syzygy and it's effects on the planet
Slightly spoilers here, but in the novel The Three-Body Problem, there's a scene in which Civilization #184 is destroyed by the stacked gravitational attraction of the planet's (aptly named Trisolaris)...
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Horseshoe orbits and integration in C
I'm studying a particular case of the restricted three-body problem. It's been found that some objects follow a horseshoe orbit pattern, and I'm trying to sort out something through an integration ...
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How to discover Neptune from the Uranus orbit (by computer simulation)
I would like to demonstrate the existence of another planet (Neptune) by studying the discrepancy between the observation of the Uranus orbit and the mathematical prediction, this work was made from ...
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Astronomy online degrees
I have a masters degree in computer science and statistics but would like to advance my knowledge in astronomy, ideally in getting some kind of online degree.
Does anybody have experience, ...
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Question about the Figure-eight periodic planar three-body motion
If this is a posible periodic solution for a three-body problem, can anybody tell me where is the center of mass of the system? As we know, in a n-body problem the bodies orbit around their center of ...
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Is Universe Sandbox 2 realistic?
Universe Sandbox 2 is the second installment of Universe Sandbox that is available on Steam. It is an educational simulation game based on astronomy and anything space, it ranges from supernova ...
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Stability of orbital resonance
Recently I've become more interested in the topic of the stability of planetary systems. I have been reading about it and it seems that orbital resonances play an important role in the stability of ...
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How to scale down solar system data to simulatable values
Okay, I am seriously ashamed for asking this especialy when I geniualy study on physics but there is something that bugs me with the simulation I am working on.
I am re-creating the solar system in an ...
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Semimajor axis variations in co-orbital moons
I've been playing with simulations of co-orbital bodies similar to Saturn's moons Janus & Epimetheus- horseshoe orbits where the two bodies are of comparable mass- and I'm seeing some very odd ...
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For how many bodies can there be a stable orbit with no very heavy central body?
The question is a bit vague, but let me explain:
Take for example 2 bodies of the same mass. They can orbit around their centre of mass/gravity. Is something like this possible with multiple ...
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Mass resolution
Can someone define mass resolution in terms of cosmological simulations such as the millennium simulation? Is it just the smallest mass that a dark matter particle can have and still be detected by ...
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Simulation packages or theory to work with gravitational collapse of massive molecular clouds?
So, I am getting interested in gravitational collapse of large molecular clouds that fragment and collapse into multiple stars. Are there well-known popular academic simulation packages that simulate ...
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Does one need to take into account finite gravity speed in N-body simulations?
Most small-scale N-body simulations (e.g., planetary systems, solar system, stellar clusters, ...) use classical Newtonian gravity.
Most large-scale N-body simulations (e.g., galaxy clusters, ...) ...
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How can I predict space directions?
Did the Neptune and Pluto trajectories ever cross or was it a mere reclassification? Do studies say that I can predict an intersection between 2 trajectories or movements based on data now? Do I have ...
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What is a possible software for simulating binary star systems?
I would like to define both initial velocities and masses of components so that orbits may be either elliptical of hyperbolic. Is there any software to make such simulation?
Unfortunately, Binary ...
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Look up current positions and velocities of solar system objects
I am working on an orbital dynamics code and, for fun, I would like to model the Sun-Earth-Moon system with my code. I can look up the masses of each object just fine, as well as average distances ...
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Exercise: 2D orbital mechanics simulation (python)
Just a little disclaimer beforehand: I have never studied astronomy or any exact sciences for that matter (not even IT), so I am trying to fill this gap by self-education. Astronomy is one of the ...
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What happens if two galaxies collide very quickly?
What would happen if two galaxies collided very quickly (e.g. at near the speed of light)? Would they mostly just pass through eachother unscathed, or would there be very energetic collisions that ...
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What are the biggest problems about the numerical, finite-element GR models?
As I know, for example the modelling of the collapse of a neutron star (to a black hole) wasn't done correctly until now.
Why? Yes, I know, the Einstein Field Equations aren't really easy to solve. ...
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Where can I find a set of data of the initial conditions of our solar system?
As the title suggests, I'm in need of a set of data of our solar system. Similar to this http://bima.astro.umd.edu/nemo/archive/#iau25, but more specifically, the Dubinsky Milky Way-Andromeda data.
I'...
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Convert orbital elements to positions and velocities
I've written a quick and dirty n-body simulator, but currently it requires initial positions and velocities. I've been looking for a way to convert Keplerian orbital elements to positions and ...
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Emulation of an Orrery
Orrery is a clockwork model of the solar system. I am trying to emulate one in 2D. Now, to emulate, I need to know what goes on inside. Can someone please explain the basic principle behind the ...
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On analogies between gas and stellar systems
Analogies between (typically) ideal gas and stellar systems are not only intuitively valid to some extent, but have been established and used in the studies of stellar clusters and galactic systems, ...
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