1. Cosmic Repulsion introduction to the repulsion law and cosmic models. http://www.repulsion.org/
2. Everything Forever the greater universe is infinite. http://www.everythingforever.com/
3. Sloan Digital Sky Survey A dedicated 2.5 meter telescope which uses sensitive electronic light detectors to systematically map a quarter of the sky, building a catalog of celestial objects, galaxies, and quasars. http://www.sdss.org/
4. The Foundation of the Universe describes recent discoveries of the fundamental structure of the physical universe. http://www.fundmech.com/