- Complete Sun and Moon Data for One Day
- Table of Sunrise/Sunset, Moonrise/Moonset, or Twilight Times for an Entire Year
- Rise/Set/Transit Times for Major Solar System Objects and Bright Stars
- Duration of Daylight/Darkness Table for One Year
- Eclipses of the Sun and Moon
- Solar Eclipse Computer
Computes circumstances for selected solar eclipses at any given location. - Lunar Eclipse Computer
Computes circumstances for selected lunar eclipses at any given location. - Recent and Upcoming Transits of Mercury and Venus
- Transit Computer
Computes circumstances for selected transits of Mercury and Venus at any given location.
- Altitude and Azimuth of the Sun or Moon During One Day
- Topocentric Configuration of Major Solar System
Bodies
Provides tables of low precision topocentric position data for the Sun, Moon, and major planets. - Geocentric Positions of Major Solar System
Objects and Bright Stars
Provides high precision geocentric position data for the Sun, Moon, major planets and selected bright stars. - Topocentric Positions of Major Solar System
Objects and Bright Stars
Provides high precision topocentric position data for the Sun, Moon, major planets and selected bright stars.
- Day and Night Across the Earth
Creates synthetic views of the Earth's surface (in grayscale or color) for any date and time. - Apparent Disk of Solar System Object
Creates a synthetic image of the telescopic appearance of the Moon or other solar system object for specified date and time.
- Earth's Seasons - Equinoxes, Solstices, Perihelion,and Aphelion 2000-2020
- Spring Phenomena, 25 BCE to 38 CE
- Julian Date Conversion
- Celestial Navigation Data
Provides computed altitudes and azimuths and other data for an assumed position and time. - Navigational Star Chart
- Astronomical Almanac Online
Provides complementary data to the printed Astronomical Almanac. - International Celestial Reference System (ICRS) - Important Links
- Occultations of Stars by Asteroids (International Occultation Timing Association)
