Welcome to the GraphDark E-group. GraphDark is a FREEWARE sky chart program to show when the best time to view objects in the sky at any time of the year, and from any location in the world.
GraphDark allows you to work out when an astronomical object will be visible from your location and when moonlight, twilight or low haze will affect its visibility. An additional option displays the moon’s phases as a lunar calendar. Typical uses might be planning a series of observing sessions for deep sky objects so that moonlight can be avoided, working out when a comet will be visible from your location at a reasonable altitude, or when a variable star will be visible.
GraphDark is best suited for summarising visibility of an object over a period of weeks or months, for example the apparition of a comet. Alternatively a number of objects on a single night can be displayed. By clicking on the timetable more information is provided for that particular instant in graphical or tabular form. However, if you need a more realistic display of what the sky looks like at a particular time then a planetarium type program would be more suitable, there are plenty to choose from.