Welcome to the Encyclopedia of Astronomy and Astrophysics

This unique resource covers the entire field of astronomy and astrophysics and this online version includes the full text of over 2,750 articles, plus sophisticated search and retrieval functionality, links to the primary literature, and is frequently updated with new material. An active editorial team, headed by the Encyclopedia's editor-in-chief, Paul Murdin, oversees the continual commissioning, reviewing and loading of new and revised content.

Subjects

Cosmology

Galaxies

Interstellar Medium

Stars

Solar System

Sun

Earth

Coordinates, Time, and Motion

Instrumentation and Observational Techniques

Theoretical Concepts and Tools

Space Missions

Organizations and Institutions

History and Archaeoastronomy

Amateur Astronomy, Education and Public Impact

Recent articles

Astronomical Photography by Amateurs with Telescopes
Nik Szymanek

Astronomical Wide-field CCD Imaging by Amateurs
Nik Szymanek

Astronomy on the Web
Richard Tresch Fienberg

CCDs, Filters and CCD Photometry for Amateurs
Nik Szymanek

Mercury and Venus: Observing by Amateurs
Robert Steele

Meteors: Amateur Observing by Video and Image Intensifier
Andrew Elliott

Nebulae: Observing by Amateurs
Owen Brazell

Telescopes: Control by Software for Amateurs
Mel Bartels

Telescopes, Refracting: Use for Amateurs
Stephen Tonkin

Variable Stars: Observing Eclipsing Variables by Amateurs
Taichi Kato

Forthcoming articles

Dark Matter: Its Nature
Georg Raffelt

Nobel Prize Winners in Astronomy
Patick Moore

Giacconi, Riccardo
Paul Murdin

European Southern Observatory
Catherine Cesarsky

Observatory De Haute Provence
Robert Burnage

The W.M. Keck Observatory
Fred Chaffee

Sudbury Neutrino Observatory
A B McDonald

Super-Kamiokande
Yoji Totsuka

Polar Caps
John Woodruff

INTEGRAL (International Gamma-Ray Physics Laboratory)
Peter Bond

Geminga
Lawrence Clarke