American Ephemeris and Nautical Almanac is a publication that contained information necessary for navigation, as well as data for use by surveyors and astronomers, such as a lunar ephemeris. Based on the original British publication, The Nautical Almanac and Astronomical Ephemeris, the authorization to publish this work was approved in 1849, resulting in the founding of the U.S. Nautical Almanac Office. Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. ... Adjective lunar Bulk silicate composition (estimated wt%) SiO2 44. ... An ephemeris (plural: ephemerides) (from the Greek word ephemeros = daily) was, traditionally, a table providing the positions (given in a Cartesian coordinate system, or in right ascension and declination or, for astrologers, in longitude along the zodiacal ecliptic), of the Sun, the Moon, the planets, asteroids or comets in the...

The American Ephemeris and Nautical Almanac first appeared in print in 1852, giving data for the year 1855. The information was originally determined through the use of human "computers", such as Chauncey Wright and Joseph Winlock. In 1916, following the example of the U.K., the U.S. published the marine navigation information separately as the U.S. Nautical Almanac. The work was unified in 1958. Chauncey Wright (September 10, 1830 - September 12, 1875), American philosopher and mathematician, was born at Northampton, Massachusetts. ... Joseph Winlock (February 6, 1826–June 11, 1875) was an American astronomer and mathematician. ...

External links

• Nautical Almanac History