Our products include almanacs, software and web services providing precise astronomical data.
For information related to planet rise and set times, and the phases of the moon, please refer to the United States Naval Observatory website.
Computes sunrise, sunset and twilight times using the National Gazetteer of Australia.
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.
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.
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.
Definitions for common astronomical terms.