NASA furnishes a fabulous cosmology tutorial about the big bang theory and the evolution of the universe. Visitors can discover the foundation of the big bang theory (general relativity, the Cosmological Principle), the...

This site is part of an online textbook, Fundamentals of Physical Geography by Michael Pidwirny, and provides an online chapter about the past, present, and future of the universe. Images illustrate the concepts...

CNN provides an article about a group of Australian scientists' findings of a new string of galaxies that could challenge the big bang theory. Astronomer Dr. Paul Francis states: "We are looking back four-fifths of the...

This web site from Michael Richmond at the Rochester Institute of Technology contains lecture notes for an introductory course on galaxies and cosmology. It is meant for a non-science audience with a limited background...

The Online Journey Through Astronomy offers educational materials about studies leading to the discoveries of distant galaxies and the expansion of the universe. Topics covered here include: Olber's Paradox, comoving...