The Astrophysical Journal
Devoted to recent developments, discoveries, and theories in astronomy and astrophysics.

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.

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.

Network Generator
Generates astrophysical reaction rates online using an extended database.

NASA Astrophysics Data System
Search system for abstracts in astrophysics, planetary sciences and solar physics.

Astronomy and Astrophysics for all...
you can find every thing you want on this topic in this site...

The Structure, Stability, and Dynamics of Self-Gravitating Systems
An interactive Astrophysics textbook from Louisiana State University.

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.

Astrophysics and Astronomy
Introductory essays on astrophysics and astronomy.

Space Physics Textbook
A free online textbook on space physics.

Temporal Annex
Information mostly on the fourth dimension and theoretical physics.

On the Formation of Planetary Rings
Paper presented in 1996 by L. A. Molnar and D. E. Dunn.

Physics 208 - Introduction to Astrophysics
Course offered via The Electronic University, an educational outreach server at the University of Oregon.

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.

Solar System - Celestial Mechanics
Presents ideas about the rotation of the sun and planets.

Astrophysics
E-Print archive since April of 1992.

Nuclear Astrophysics Data
An area for providing nuclear data for astrophysics calculations, such as nucleosynthesis, stellar evolution, the Big Bang, and super-nova dynamics.

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

Interdisciplinary Astrophysics Group

Dyson Sphere
A list of frequently asked questions with answers.

You Be the Astrophysicist
Interactive site for learning about astronomy and astrophysics.

Hyperspace
Site devoted to hyperspatial theories.

Smithsonian Astrophysical Observatory
A research institute of the Smithsonian Institution headquartered in Cambridge, MA, where it is joined with the Harvard College Observatory (HCO) to form the Harvard-Smithsonian Center for Astrophysics (CfA).

Living Reviews in Solar Physics
A peer-refereed, solely online journal publishing invited reviews covering all areas of solar and heliospheric physics research. Published by the Max Planck Institute for Aeronomy, Katlenburg-Lindau, Germany.

Olber's Paradox Solved
A well know problem from astrophysics, Olber's paradox (Why is the night sky dark?), solved. As well as Newton's related Gravity paradox.

Red Shift by Photon Decay
Author explains how Hubble's red shift of starlight spectra results from photon decay, proportional to traveled distance.

Hands-On Astrophysics
Offers educational products that help students understand basic astronomy concepts.

Canadian Institute for Theoretical Astrophysics
Nationally supported research centre. Find out about current research, upcoming seminars and job opportunities.

Fermilab Theoretical Astrophysics Group
Partially funded by a NASA Astrophysics Theory grant, find information about the group's past and future meetings.

Famous Astrophysicists
Profiles several prominent astrophysicists.

WCRI WalkerScience
Examines several aspects of astrophysics including the big bang, origin of heavy elements and satellites, dark matter and dark energy.

Modified Newtonian Dynamics
Overview of a controversial theory which is not generally accepted by the astrophysical community.

Physical Concepts
Explains astrophysical concepts such as relativity, quantum mechanics, gravity, black holes, dark matter, quasars, macrocosmos and microcosmos.

Physics Topics - Teaching Notes
Teaching notes on celestial mechanics, classical mechanics, and stellar atmospheres.

Grand Challenge Problems in Computational Astrophysics
Research session at the Institute for Pure and Applied Mathematics (IPAM), Los Angeles, CA, USA; 7 March - 10 June 2005.

Astrophysical Data
A nice beginners collection of constants and other data, assorted in one page... Beginner level, with links to more advanced sites.

The Titius-Bode Number Sequence Deciphered
An explanation of the Titius-Bode Law of planetary spacing.

Titius-Bode Law
Overview of the Titius-Bode Law.

SIMBAD Astronomical Database
The SIMBAD astronomical database provides basic data, cross-identifications and bibliography for astronomical objects outside the solar system. SIMBAD can be queried by object name, coordinates, other criteria (filters), and lists of objects.

AMASE - Astrophysics Multi-spectral Archive Search Engine
An online astrophysics catalog developed using object-oriented database technology to help researchers locate multi-mission data in the NASA archives.

ADAF Theory
Accretion disk theory, mixing-length theory of convection, advection-dominated accretion flows.

The NASA Astrophysics Data System
The Astrophysics Data System (ADS) is a NASA-funded project which maintains four bibliographic databases containing more than 4.0 million records: Astronomy and Astrophysics, Instrumentation, Physics and Geophysics, and preprints in Astronomy.

Contents
Accretion in astrophysics - active galactic nuclei, processes and dynamics.