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.

This publication has replaced (Blue Cover) the joint publication of the U.S. Nautical Almanac Office, United States Naval Observatory (USNO) in the United States, Her Majesty's Nautical Almanac Office (HMNAO), and the United Kingdom Hydrographic Office (UKHO).

BOOK IS NO LONGER AVAILABLE IN HARDCOVER