價格：免費
檔案大小：16.8 MB
版本需求：系統需求：iOS 9.0 或以後版本。相容裝置：iPhone、iPad、iPod touch。
Recent star trails are based on NASA data on near-Earth objects (NEO) and display tracking information about asteroids, meteors and comets.
You can find more alien planets in the past or in the future according to the date, learn more about their orbit, speed, diameter, distance, and you can know their own names.
