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

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.

Generates astrophysical reaction rates online using an extended database.

Search system for abstracts in astrophysics, planetary sciences and solar physics.

you can find every thing you want on this topic in this site...

An interactive Astrophysics textbook from Louisiana State University.

Introductory essays on astrophysics and astronomy.

A free online textbook on space physics.

Information mostly on the fourth dimension and theoretical physics.

Course offered via The Electronic University, an educational outreach server at the University of Oregon.

University of Surrey abridged version of the book "Astrophysics" , with many links to relevant material on astronomy, astrophysics and cosmology.

Presents ideas about the rotation of the sun and planets.

E-Print archive since April of 1992.

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

A description at the layman level about the applications of spectroscopy in the investigation of the Solar System, with interactive diagrams

A list of frequently asked questions with answers.

Interactive site for learning about astronomy and astrophysics.

Site devoted to hyperspatial theories.

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.

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

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

Offers educational products that help students understand basic astronomy concepts.

Nationally supported research centre. Find out about current research, upcoming seminars and job opportunities.

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

Profiles several prominent astrophysicists.

Teaching notes on celestial mechanics, classical mechanics, and stellar atmospheres.

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

An explanation of the Titius-Bode Law of planetary spacing.

Overview of the Titius-Bode Law.

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.

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

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.

Text of the 1999 Oppenheimer lecture at UC Berkeley given by professor Freeman Dyson on the origin of life and other subjects.

Comprehensive archive of explantory articles on all key Astrophysics topics, categorised and fully searchable; actively updated by the Institute of Physics.

Beginner's guide to all the basic concepts of Astrophysics written by active scientists at Cambridge University, UK.

THIS - instrument pages for the Tuneable Heterodyne Infrared Spectrometer developed by the University of Cologne. THIS is a transportable receiver designed for atmospheric and astrophysical observations in the mid infrared spectral region (7-28 µm).

Articles published on this site cover current research in astronomy and astrophysics, describe our current understanding of astronomical phenomena, and comment on issues related to astronomical research.

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.

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