In this software, we have collected a collection of knowledge and achievements of several thousand years of human beings in this science for you, and we have comprehensively provided it to you, dear users.
In this software, from the introduction of planets, stars, galaxies and nebulae to probes and astronauts, we have fully explained.

This application contains 1000 pages of text
1000 images
50 movies.
Images, videos and text of the software are downloaded and saved online.