Astronomical Information
Our products include almanacs, software and web services providing precise astronomical data.
Moon and Planet Information
For information related to planet rise and set times, and the phases of the moon, please refer to the United States Naval Observatory website.
Sunrise, Sunset and Twilight Times
Computes sunrise, sunset and twilight times using the National Gazetteer of Australia.
Moonrise and Moonset Times
Compute Moonrise and Moonset Times. To use this facility you need to know the latitude and longitude of the location you want to calculate rise and set times for.
Sun, Moon Azimuth and Elevation
Compute Sun and Moon Azimuth & Elevation To use this facility you need to know the latitude and longitude of the location for which you want to calculate the azimuth and vertical angle.
Summer and Winter Solstice
The summer solstice is the day that has the most daylight hours of any in the year. The winter solstice is the day of the year that has the least daylight hours of any in the year.
Astronomical Definitions
Definitions for common astronomical terms.