I forget exactly where I learned about NightCap Camera. I think in an astronomy magazine. NightCap Camera is an app for the iPhone that helps with low light situation and sounded like a possible solution when using the iPhone and an adapter for astrophotography through an eyepiece on a telescope.
I read through the articles on the NightCap Camera website and identified some things I would like to try once I settle on an iPhone adapter to try.
Specifically, the modes for the moon, star and star trails. It had some options to image galaxy using a telescope but not sure. But, maybe that would work for planets.