I was using 1.6.0 for ages I think, this 1.9 series update went completely unnoticed by me. There is a new GUI and added features. I think the lunar globe is especially good. The x64 version seems cool. https://marble.kde.org/features.php Download: https://marble.kde.org/install.php PortableApps: http://portableapps.com/apps/education/marble_portable
Why Marble and not Google Earth? I love Open Source stuff so that's why I'm asking, not because I like GE more than anything else.