Celestia Portable 1.6.2.2

Celestia Portable is a free, open-source space simulation software that allows users to explore the universe in 3D. It features a vast database of stars, planets, moons, asteroids, and comets, as well as spacecraft and artificial satellites. The software also allows users to customize their view of the universe and simulate space travel. Celestia Portable can be run directly from a USB drive without installation.