Allen's Astrophysical Quantities Apr 2026

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

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

The primary goal of the book is to provide fundamental astrophysical information in a concise, readily usable format. It saves researchers significant time by offering a centralized source of reliable, curated data, which ensures consistency and reproducibility across different investigations. Key Features and Scope Often referred to as the "astrophysical Bible," (AQ)

While highly technical, it serves as a primary reference for undergraduate and graduate students entering the field of astrophysics. Editions and Evolution Purpose and Impact Covers a vast range of

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