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Alcuni calcoli utiliAlcuni calcoli utili
Marco Menichelli
  
AstrometricaAstrometrica
Herbert Raab
  
Astronomy softwareAstronomy software
Dan Bruton
  
Astronomy softwareAstronomy software
The Salopian WEB
  
Atlante LunareAtlas Virtual de la Lune
Christian Legrand e Patrick Chevalley
  
BinObjBinObj
Fabio Ficola
  
C2AC2A
Philippe Deverchère
  
Calendar converterCalendar converter
John Walker
  
Calendrical CalculatorCalendrical Calculator
Holger Oertel
  
CalSkyCalSky
  
Carte AstronomicheCartes du Ciel
Patrick Chevalley
  
CelestiaCelestia
Chris Laurel
  
Data ServicesData Services
U.S. Naval Observatory - Astronomical Applications Department
  
Dimension 4Dimension 4
  
Eclipses Online Portal (UK Hydrographic Office)Eclipses Online Portal
(UK Hydrographic Office)
  
Eclissi e CalendariEclissi e Calendari
Paolo Bonavoglia
  
GraphDarkGraphDark
Richard Fleet
  
ESA Earth Observation Orbits WebsiteESA - Earth Observation Orbits Website
  
Hallo Northern SkyHallo Northern Sky
Han Kleijn
  
Heavens-AboveHeavens-Above
  
HomePlanetHome Planet
John Walker
  
Il Sole onlineIl Sole online
Istituto Tecnico Nautico Artiglio (Viareggio - LU)
  
Improved Solar Calculators (NOAA)Improved Solar Calculators
NOAA - National Oceanic and Atmospheric Administration
  
JPL's HORIZONS System JPL's HORIZONS System - Ephemerides for solar system objects
J.P.L. - N.A.S.A.
  
Lunar Occultation WorkbenchLunar Occultation Workbench
Dutch Occultation Association
  
Lunar Terminator Visualization ToolLunar Terminator Visualization Tool
di Jim Masher e Henrik Bondo
  
Moon calculatorMoon calculator
Monzur Ahmed
  
NASA Eclipse Home PageNASA Eclipse Home Page
Fred Espenak
  
OccultOccult
David Herald
  
Orologi SolariOrologi Solari
Gian Casalegno
  
PlanetarioPlanetario
Riccardo Andreoni - Giuseppe Forti - Piero Ranfagni
  
ShadowsShadows
François Lateyron
  
Sky CalendarSky Calendar
Stig Ottosen
  
Solar System LiveSolar System Live
John Walker
  
Solar System SimulatorSolar System Simulator
J.P.L. - N.A.S.A.
  
SolexSolex
Aldo Vitagliano
  
StellariumStellarium
Fabien Chéreau et al.
  
The Celestial Sphere by Peter Csapo (Planetario Virtuale)The Celestial Sphere by Peter Csapo (Planetario Virtuale)
  
The PlanetsThe Planets
Brendan Murphy
  
Variable Stars ObserverVariable Stars Observer
Patrick Chevalley
  
Your SkyYour Sky
John Walker
  
WinstarsWin Stars
Franck Richard