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Ringraziamenti
- Sky Charts 2.7, by Patrick Chevalley,
http://www.astrosurf.com/astropc
- Comet Orbit 4.0 , FOGLIA Sergio (InterNet: foglia@libero.it)
Serafino Zani Observatory
- GraphDark Version 2.03, Richard Fleet (rfleet@clara.co.uk)
- Tasco SkyWatch, TheSky Astronomy Software,
http://www.tascosales.com
