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...

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...

This lab activity provided by the University of Washington's Astronomy Department, gives an introduction to Big Bang Nucleosynthesis. This lab helps students understand why helium abundance in our universe provides...