Star Tracker: Night Sky Map and Stargazing Guide is a free Android application designed for space science enthusiasts. The app provides a real-time night sky map and stargazing guide to help users identify and observe planets, heavenly bodies, and stars. The app is a hand-held planetarium that can be used to identify stars, planets, nebulae, and more.

One of the key features of the app is the 3D model of our Solar system, which provides a unique and interactive way to explore our planetary system. Additionally, the app offers 3D models of spacecraft and space exploration, an astronomical calendar of celestial events, and beautiful panoramic photos of space objects. The app also includes astronomy news and current events in the "What's new" section, keeping users up-to-date with the latest discoveries and events in the field.