The Astrophysical Journal Devoted to recent developments, discoveries, and theories in astronomy and astrophysics. http://www.journals.uchicago.edu/ApJ/

Cause of the Characteristics of Quasars Hypothesis which attempts to explain the characteristics of QSOs (Quasi-Steller Objects), a.k.a. quasars, as optical illusions created by gravitational lensing and other phenomena. http://www.geocities.com/isoptera.geo/index.html

The Electric Universe Physics knows four forces; 20th-century scientists were convinced that one of those, the electric force, played no macroscopic role in the Universe; site explains why that is incorrect. http://www.electric-universe.de/

Network Generator Generates astrophysical reaction rates online using an extended database. http://www-astro.ulb.ac.be/Netgen/form.html

NASA Astrophysics Data System Search system for abstracts in astrophysics, planetary sciences and solar physics. http://adsabs.harvard.edu/

Astronomy and Astrophysics for all... you can find every thing you want on this topic in this site... http://www.geocities.com/astrosci4u/

The Structure, Stability, and Dynamics of Self-Gravitating Systems An interactive Astrophysics textbook from Louisiana State University. http://www.phys.lsu.edu/astro/H_Book.current/H_Book.shtml

Gravity is Cool, or, Why our Universe is Hospitable to Life Text of the 1999 Oppenheimer lecture at UC Berkeley given by professor Freeman Dyson on the origin of life and other subjects. http://splorg.org/lectures/dyson.html

Astrophysics and Astronomy Introductory essays on astrophysics and astronomy. http://www.hpwt.de/Astroe.htm

Space Physics Textbook A free online textbook on space physics. http://www.oulu.fi/~spaceweb/textbook/

Temporal Annex Information mostly on the fourth dimension and theoretical physics. http://temporal_science.tripod.com/

On the Formation of Planetary Rings Paper presented in 1996 by L. A. Molnar and D. E. Dunn. http://www-astro.physics.uiowa.edu/~lam/research/rings/

Physics 208 - Introduction to Astrophysics Course offered via The Electronic University, an educational outreach server at the University of Oregon. http://zebu.uoregon.edu/~imamura/astro.208.html

University of Surrey - Department of Physics (Research) University of Surrey abridged version of the book "Astrophysics" , with many links to relevant material on astronomy, astrophysics and cosmology. http://www.ph.surrey.ac.uk/astrophysics/index.html

Solar System - Celestial Mechanics Presents ideas about the rotation of the sun and planets. http://www.surf2000.de/user/f-heeke/index.html

Astrophysics E-Print archive since April of 1992. http://www.arxiv.org/archive/astro-ph

Nuclear Astrophysics Data An area for providing nuclear data for astrophysics calculations, such as nucleosynthesis, stellar evolution, the Big Bang, and super-nova dynamics. http://t2.lanl.gov/data/astro/astro.html

Above the Skies, An Exploration into Our Universe Through Animated Spectroscopy A description at the layman level about the applications of spectroscopy in the investigation of the Solar System, with interactive diagrams http://hea-www.harvard.edu/~efortin/thesis/html/index.shtml

Interdisciplinary Astrophysics Group http://altamira.asu.cas.cz/

Dyson Sphere A list of frequently asked questions with answers. http://www.nada.kth.se/~asa/dysonFAQ.html