Gaia Sky is a real-time, 3D, astronomy visualisation software
Siril
A free astronomical image processing software
Marble
Ua riro te maramora ei vahi faahiahia mau no te ao nei — ta outou tipi a te nuu no helevetia no te mau hoho'a fenua o ta outou e nehenehe e faaohipa no te haapii hau atu â no nia i te Fenua e te tahi atu mau palaneta.
Stellarium
Stellarium is a free open source planetarium for your computer.
KStars
KStars is a Desktop Planetarium by KDE. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time.
Celestia
Celestia – real-time 3D visualization of space