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...

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 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...

PBS presents a timeline of the universe from the Big Bang to the future. This interactive website offers concise introductions to many of the key developments of the universe including the formation of elements, the...

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...

At NOVA's Origins website, users can "journey back to the beginning of everything: the universe, Earth, and life itself." The web site offers a series of interactive modules where visitors can decide if life exists on...

Created by astrophysicist Richard Powell, An Atlas of the Universe is a Web site that allows visitors to see nine main maps of the universe, ranging from 12.5 light years to 15 billion light years from the sun. Each map...

This website, containing information from the Sloan Digital Sky Survey, provides projects and activities for advanced astronomy students. In this particular one, the user retraces Edwin Hubble's steps to discover that...

This website, authored by Ricky Leon Murphy of Astronomy Online, is a collection of references, images, and information for general astronomy. This work covers topics from the basics of science and observation through...

This website, created by Lindsay Marie Bartolone at Princeton University, gives astronomy teachers labs and activities for their students that meet the requirements of the Core Curriculum Content Standards of the State...