Marble - free, powerful virtual globe
Perhaps the most practical functionality of the Marble – work on the maps of the OpenStreetMap project. It is a voluntary non-profit project, to solve an ambitious task to create a database of
KStars - desktop planetarium for KDE
KStars - virtual C++ / QT / KDE planetarium that displays an accurate picture of the night sky (including the Sun, moon, stars, constellations, clusters, nebulae, galaxies, comets, asteroids,
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