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Ever wanted to sail around a black hole?
Welcome to Project SAB-GHOOMo (Simulating Around Blackholes - Gravitationally Honest Orbital and Other Motion).
In this application, you can simulate motion around a black hole - using Einstein's theory of general relativity.
The rules are simple:
Step 1: Choose the type of particle you wish to send into orbit: either a "massive object" or "light" (i.e. any massless particle)
Step 2: Use the scrolling bar below to change the mass of the black hole
Step 3: Set a value of "L" i.e. angular momentum of the orbiting object
Step 4: Choose how far away you want to start your journey by choosing an initial "Radial distance".
Once all that is done, you're ready for lift-off! Click on "Run" to start your journey: the white ball is your chosen object, and the red circle indicates what we call the "point of no return" - or the event horizon (at r = 2M for the Schwarzschild black hole).
Play around with these parameters and see all the cool patterns you get - see the pictures below as examples, and then make your own!
Some example images
A particle being swung out of orbit to infinity
A particle "spiralling" until it reaches the event horizon
A stable orbit, with a constant radius
An elliptical orbit
Curious to know what exactly goes on?
Here is a simple explanation
A Simple Explanation
and here is a more rigorous one that goes into the details of the mathematics:
The mathematics behind it
Credits:
Conception, Design and Maintenance by Moeez Hassan.
Programming, Implementation and Deployment by Muhammad Baqir.
Description and Explanation by Mah Noor Jamil and Aiman Nauman.
Initial support to this project provided by the LUMS Learning Institute (LLI).
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