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Moon Phase Calculator is simple and easy to use tool that allows you to calculate the phase of the Moon for any time in the past or future and to search for the next or previous full moon, new moon or first or last quarter.

A program to search for eclipses (lunar, solar, total, annular and umbral), to calculate the phase of the Moon at any given date and time and to convert between dates in the Gregorian and Julian calendars and dates in four lunar calendars.

This utility can convert a gregorian date into julian day format/Modified Julian Day format and vice versa. The Julian Day Format counts the day since the 24th november -4713bc.

View a dark energy inside Solar system on your dektop with this screensaver! This screensaver shows all planets of our solar system, uncluding Saturn's rings. It makes you able to know about dark matter and dark energy in our planet system.

A program to convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and to find lunar new year's day and leap months for any year in the Chinese Calendar.

The World Almanac displays solar and lunar data for every 30 minutes throughout the day in addition to the times of rise, set, twilight, the lunar phase and the horizon. Includes database of towns for Australasia, Canada. UK and USA.

StarStrider is a software planetarium that utilizes the latest in 3D-technology in order to show you not only the planets and satellites of our solar system, but also galaxies, nebulas, and hundreds of thousand of stars - in real-time 3D.

Complete astronomy software suite exploring realistic skies in real time, with observing log, Live Orbits, Sky Quiz, spoken guidance, A-Z encyclopedia, and a concentrated search embracing planets, comets, asteroids, DSOs, and 300,000 stars.

Custom designed software to capture images from telescopes cameras manufactured by The Imaging Source.

CyberSky is an accurate, yet easy-to-use planetarium program that provides an excellent way to learn about astronomy and explore the sky visible in the distant past, the present, and the far-off future.