Gaia Sky is a real-time, 3D, astronomy visualisation software
Cyril
A free astronomical image processing software
Marscaim
Is Atlas Globe agus Atlas Domhanda Fíorúil é Marble - do scian Arm na hEilvéise le haghaidh léarscáileanna ar féidir leat a úsáid chun níos mó a fhoghlaim faoin domhan agus faoi phláinéid eile.
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