Astrophysics

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.

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

Information mostly on the fourth dimension and theoretical physics.

Part of the Solar Physics and Space Plasma Research Centre at the University of Sheffield. Provides information on the research into solar and space plasma wave physics, the people involved and their publications.