- 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
- USNO
Eclipse Portal
Maps, global circumstances, local circumstances, and animations for all solar and lunar eclipses from 1501 through 2100 inclusive - Eclipses of the Sun and Moon
Eclipse Visibility Maps from The Astronomical Almanac (PDF) - 2017 August 21 Total Solar Eclipse
Resource center for the 2017 eclipse crossing the continental United States - 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 positions for the Sun, Moon, major planets, and Pluto - Geocentric Positions of Major Solar System
Objects and Bright Stars
Provides high-precision geocentric positions for the Sun, Moon, major planets, Pluto, and selected bright stars - Topocentric Positions of Major Solar System
Objects and Bright Stars
Provides high-precision topocentric positions for the Sun, Moon, major planets, Pluto, and selected bright stars
- What the Earth Looks Like Now
- Day and Night Across the Earth
Creates synthetic views of the Earth's surface for specified date and time - Apparent Disk of Solar System Object
Simulates appearance of selected solar system bodies in small telescope for specified date and time
- Celestial Navigation Data
Computes almanac data for major solar system bodies and navigational stars for an assumed position and time - Navigational Star Chart