I can a render all these huge objects?

I have a scene that consists of a small ship and huge planets. The problem is that neither the main camera nor the scene view will render the objects (unless you're real close). All the planets get greyed out because they're so big. I've tried making my ship a lot smaller but it just caused a lot more problems and I tried doing the answers in this link but it barely helped. I want to be able to see every object in the space scene without the planets getting greyed out or disappearing when too far away. (Both in the camera view and in the scene editor)