A worldwide resource for fundamental astronomical data, the Astronomical Almanac includes contributions from astronomical experts, as well as a wide variety of technical and general astronomical information. This includes:
- Positions of the Sun, Moon and planets to milli-arcsecond precision for each year
- Positions of dwarf planets, small solar system bodies planetary satellites for each year
- Data relating to Earth orientation, time scales and coordinate systems
- Phenomena including eclipses of the Sun and Moon, sunrise/set, moonrise/set and twilight times
- Reference data for stars and stellar systems and related astronomical constants and technique
This is a joint publication with the United States Naval Observatory.