The heavyweight form provides the same features with more graphic detail. The lightweight form provides a two-dimensional map of the moon and a complete database of lunar topographical features. Written in Delphi 6, it comes in lightweight form, without OpenGL graphics, and heavyweight (basic and expert), with OpenGL graphics. Created by a programmer (Christian LeGrand) and a lunar observer (Patrick Chevalley), Virtual Moon Atlas 2.1 is a Windows application distributed under the GNU General Public License. Since my old 60-millimeter telescope is a tad small for observing deep space objects like galaxies, my journey started with one small step to the moon. Amateur astronomers use these programs to identify lunar features, chart celestial bodies for observing sessions, and take users on virtual tours of the universe. The open source software movement is making the leap from the desktop to the stars with applications like Virtual Moon Atlas, Stellarium, and Celestia.