Allen's Astrophysical Quantities -

Includes detailed information on the interstellar medium, galaxies, quasars, and cosmological parameters such as the Hubble constant.

Often referred to as the "astrophysical Bible," (AQ) is a classic reference book containing essential data for professional astronomers, researchers, and students. Originally authored by C.W. Allen and first published in 1955, the text has served as an indispensable handbook for generations. Purpose and Impact Allen's Astrophysical Quantities

Covers a vast range of topics including general physical constants, solar system data (Sun, planets, moons), and stellar properties like mass, luminosity, and evolution. solar system data (Sun