I am looking for software to input planetary bodies and use it to determine distances between each body at certain times. Software doesn't need to be 3D but needs to be graphic.
I know there are software packages like Universe Sandbox but I would greatly prefer something that is free and relatively easy to learn as I am a student. I have most of the required information for planetary bodies, orbital distance, eccentricity, mass and so on.
Running on Windows 10. As for price, at most I'd say less than $30 USD since that is the cost of Universe Sandbox.