Fantastic Starry Sky is an Android application developed by RachelSolagesK2. It falls under the category of Utilities & Tools and is available for free. This app allows users to observe stars through a telescope that is connected to their phone via Bluetooth.

One of the main features of Fantastic Starry Sky is its use of the Sky Map open-source project, which enhances the drawing engine and allows for smoother and faster star rendering without the need for a network connection. The app also utilizes rotary encoders connected via Arduino to determine the direction of the telescope.

Compared to the original Sky Map app, Fantastic Starry Sky offers several improvements. Firstly, it increases the number of stars that can be observed, with options to choose from 1,600, 15,000, 40,000, 80,000, and 120,000 stars. However, selecting a rich starchart may result in longer loading times and potential out of memory errors. Additionally, the app features updated icons for Messier heavenly bodies based on their types. Finally, users have the ability to rotate the screen around the pole axis center or the zenith-nadir axis center.

With its seamless connectivity to telescopes and enhanced star rendering capabilities, Fantastic Starry Sky provides users with a captivating and immersive stellar observation experience.