There are plenty of telescope adapters available for those of you who’d want to attach your smartphone to your telescope to get a better view of the sky. If you know your 3D printing, you can always print your own. Adafruit has shared a guide that shows you how to print an iPhone X telescope adapter for the Celestron FirstScope.
The adapter was printed in PLA element. You are going to need a few screws, tripod, and other simple tools to complete this project. The source files for the design are available, so you can modify this project for other smartphones.[HT: Adafruit]