# Question Simulation scaling down units

Discussion in 'Physics' started by VascoCorreia, Dec 6, 2022.

1. ### VascoCorreia

Joined:
Dec 5, 2020
Posts:
23
Hello!

I am currently developing a simulation of the solar system and I wanted it to be realistic taking into account my current capabilities. At least gravity I want to be simulated accurately.
Everything needs to be scaled down (distances, masses).

The scaling factor I am using for distance is 1 unit = 100000 (km).
And the mass scaling factor is 1 = 1,00e+25.

With this said, I am having difficulty figuring out how to scale the gravitational constant for Newtonian gravitation law.
Its value is: 6.674e-11 (s^3 * kg^-1 * s^-2)

Considering my scaling factors how would I calculate the correct value for the gravitational constant for my simulation?

Hopefully, the question is clear, For any clarification just ask and I will try to explain as best as possible.

2. ### halley

Joined:
Aug 26, 2013
Posts:
2,599
Edy likes this.
3. ### Gotmachine

Joined:
Sep 26, 2019
Posts:
38
Why ? If you're doing it in thinking you will avoid 32bit float precision issues the short answer is that you won't.