Greetings!
About your project:
We can make the component that you need for drawing the trails of the planets. About the orbital path, we can also do it for you for circular paths (if they're not circular, we would need to develop a more robust tool for generating the orbital path, which would be more expensive).
About us:
We are a couple which consists of a programmer and a level designer. We got picked as preferred freelancers because of our UE4 and Unity reviews and we are sure that we can do a great job for you.
Final words:
Please take some time to look at our portfolio and profile page, we are sure that we can do a great job for you.
About pricing and everything else, please contact us so we can forge a deal that works for both parties.
Thanks for your attention,
Rafael and Monique