Celestia

If you like astronomy, this is your lucky day. Celestia is an astronomy program that will allow you lots of actions in space. You can choose if you prefer to stay in Earth or to travel throughout the Solar System, to any of over 100,000 stars and more You will be able to see the position of the stars in first person, do a trip seeing and visiting the planets you want,... Celestia comes with a large catalog of stars, planets, moons, asteroids, comets, and spacecraft. If that’s not enough, you can download dozens of easy to install add-ons with more objects from the official site.