/sci/ - Science & Math

>>11264824
Skipped a few points.

The point of projecting a 2D pattern onto a 3D surface, instead of the other method, is that there's actually a device that can do that.
A projector.
Then you can have thousands of objects and vary their velocities to your hearts content.

I also said that moving the light source in the z-axis is a cheat.
What you actually want to do is deform the 3D surface you're projecting onto instead, whilst keeping the light source in the same place.
Ideally the surface will be able to go between concave, flat and convex. And you want it to deform according to gravity.
Fortunately another guy, Albert Einstein, did some work showing that mass distorts space-time, giving us the rubber-sheet experiment, which deforms from flat to concave according to gravity.

Obviously you can imagine projecting a 2D model of a galaxy onto flat surface compared to the surface in the pic related.
In the pic related version, objects near the centre would appear smaller and dimmer compared to their flat counter-part. The apparent size of the orbits would also appear smaller whilst the orbital period remained the same, resulting in a lower observed velocity.