Video describes how stars move in a spiral galaxy and how their speeds can be explained by accounting for dark matter. [3:17] Includes a brief quiz and a list of additional resources to explore.

An excellent site dedicated to the constellations and information about the objects which make them up. Contains a great deal of information about various stars, galaxies and other objects, as well as details on how best to observe them.

Black holes seem to be a constant point of debate for astronomers. This article confirms the theory that black holes can help form massive stars and gives more support to the idea that black holes play a big role in galaxy formation....

Black holes seem to be a constant point of debate for astronomers. This article confirms the theory that black holes can help form massive stars and gives more support to the idea that black holes play a big role in galaxy formation....

Zoom in and out to explore our galaxy in this interactive 3D visualization of the stellar neighborhood, including over 100,000 nearby stars.

Numerous high quality images of galaxies can be found in this site. Names, exposure times, and various magnifications are provided.

Numerous high quality images of galaxies can be found in this site. Names, exposure times, and various magnifications are provided.

StarChild from NASA defines and describes the Solar System in a simple and easy-to-understand manner. The website is broken down into two versions for the student, grade school and junior high.

Learn everything you can about outer space with this interactive astronomy unit. 2 levels of difficulty with modules on the solar system, the universe, other "space stuff" and a glossary of terms. Links for parents and other great website.

This site provides an introduction to the origin of the universe for the young child and the Big Bang theory. There is also a song about the Doppler Shift. Vocabulary glossary and printable version available.

This site provides a description of "dark matter" and how scientist study it.

This complete resource will help students to improve their understand of space exploration. Includes images of the universe, galaxies, stars and planets.

This resources focuses exclusively on astronomy. It's packed with historical facts about space exploration, famous people who pioneered the study of stars and planets. It features chronological list of space exploration, current news,...

Amazing Space promotes the "science and majestic beauty of the universe for use in the classroom." Here you can find learning activities, lesson plans, teaching guides, and helpful tips for students eager to learn about space and space...

A site for images and how to take images of the night sky. Backed by Meade, a maker of telescopes. Good information on equipment and techniques as well.

Site provides a brief introduction to binary stars. Additional resources for students and teachers on this topic are offered as well as related topics.

The Universe is very diverse and contains many unique elements that can be observed in this gallery of pictures.

Biographies of people throughout history who looked at the sky and wondered what was there. Links to a detailed description of the planets and interactive activities.

Take this ten-question self-scoring quiz to test your knowledge of astronomy facts: age of the universe, why stars and planets are spheres, where other life might exist in the outer space, the Milky Way, and more.

This is a definition and example of how distance is measured in astronomy, such as the distance between our earth and the stars.

This site from Hubblesite has a very long list of Hubble Space Telescope Images listed by subject. General categories of subjects include Solar System, Stars, Nebulae, Star Clusters, Novae, Supernovae, Stellar evolutionn, Galaxies, and...

Charles Messier (1730-1817 CE) is credited for discovering 13 comets. He also began the Catalog of Nebulae and Star Clusters. This catalog as well as a great deal of information on Messier is available here. The Messier objects are also...

This site examines the black hole as an object in astrophysics. Delve into this comprehensive resource that covers this concept from its history, to qualitative physics, the reality of black holes, mathematical physics and more.

A video and a short multiple-choice quiz on the Universe and what it is made up of.