1911 Encyclopædia Britannica/Ephemeris

EPHEMERIS (Greek for a “diary”), a table giving for stated times the apparent position and other numerical particulars relating to a heavenly body. The Astronomical Ephemeris, familiarly known as the “Nautical Almanac,” is a national annual publication containing ephemerides of the principal or more conspicuous heavenly bodies, elements and other data of eclipses, and other matter useful to the astronomer and navigator. The governments of the United Kingdom, United States, France, Germany and Spain publish such annals.