Planetary, Lunar, and Stellar Visibility

Planetary, Lunar, and Stellar Visibility represents an interesting means of showing users a 3-color diagram that represents when the moon, a star, a planet or the sun are visible during any year starting from 3000 BC to AD 6000 at any region on the planet The vertical axis marks the months of the year, the horizontal axis marks the hours of the day.

The three colors create a contour map effect and show whether the body is under the horizon (black) and invisible, above the horizon with the sun (light color) and invisible, above the horizon without the sun (shaded color) and so possibly visible.

The times of sunrise and sunset and when the sun reaches specified altitudes above or below the horizon can be shown as curves on the diagrams. By moving the mouse over the diagram, the date and time along with the object's altitude, azimuth, and magnitude, or the phase of the moon, are displayed.

Planetary, Lunar, and Stellar Visibility computes and tabulates the dates of visibility phenomena: for planets and stars first and last visibility, acronychal rising and cosmical setting; for the moon first and last visibility, and the tables provide much supplementary information.

These phenomena are very useful for historical purposes. Since the computation of visibility phenomena is complex and uncertain, alternate methods are provided and parameters can be altered by the user to find what appear to be the best results.

There are also diagrams of solar and lunar eclipses, of the rotation, inclination, illumination, and apparent size of the bodies, and of Jupiter's satellites. The settings for the computations may be saved, the graphics may be saved, pasted into documents, and printed, and the tables for visibility phenomena may be accumulated, edited, printed, and saved as .rtf files or HTML files to be pasted into documents and printed.

visibility diagrams for the sun, moon, planets, and stars dates of heliacal phenomena of planets and stars dates of first and last visibility of the moon .rtf files of all information for visibility phenomena HTML files of times of rising, culmination, and setting of the sun and the moon, planet or star, with differences, for each day of the year HTML files of all information for visibility phenomena for up to 100 years documentation, which explains the program, methods of computation, and user modifications