Explore how our contemporary understanding of the universe came to be. This overview looks at the history of three main areas of study, namely space, time, and the arrangement of matter.

This journey will help you solve big questions about the universe. You will be able to see beyond human capabilities and will learn what scientists are discovering.

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.

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

The following tutorial is an explanation of what the universe is composed of.

This site provides a description of "dark matter" and how scientists study it. Vocabulary words linked to a glossary of terms, and a printable version are also available on the site.

Can you help a cow plot a path out of the Milky Way? This hilarious space game is for all ages and is offered by HubbleSite. Users may pick their level of expertise and can choose from novice, pretty smart about space, or an astrobrainiac.

A clear explanation of how dark matter was discovered and why it is important to astronomers.

Get a tour of space with images collected from the Hubble telescope. See nebulae, galaxies, and star clusters on this site. Google Earth must be downloaded to use.

In Spanish. Article reports on the best photo taken yet of the Antennae Galaxies, captured by the Hubble telescope.

Imagine a time when you can travel through space, planet to planet, cheaply and in comfort, when you can take a trip to the stars as your next holiday. Well, imagine no more. Learn more about the solar system as you take this trip of a...

Enter your birthday and find out how old you are on the other planets in the Milky Way Galaxy. Understand why our age is different on each planet.

Go behind the scenes of the Hubble and discover the different shapes and images it provides.

The information, geared mainly for younger viewers, provides simple and basic information about the Milky Way, and includes several embedded links to related information.

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 space telescope image displays the center of the Milky Way Galaxy and its "A Cauldron of Stars." In addition, a detailed textual overview explains various specifics of the picture.

Part of a larger online exhibit on the moon and space, this site deals with one's place in the universe. The topics covered include the sun and solar system, the galaxy, and the universe.

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.

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.

Contains a full physics curriculum with links to games, webcasts, and activities. By creating a free account, students and teachers can create their own personal collection of resources.

This site from IPAC is a series of images of various celestial objects and regions as viewed in infrared light. Each photo is accompanied by a caption.

This site from SkyServer provides information where students are introduced to Galileo and are transported back in time to learn what "Old Time Astronomy," was all about.

This site provides a description of the universe and what it contains. Includes links to definitions, activities, and an audio song. Printable version available.

Description of the three major components of the Milky Way galaxy as well as images and resources for further reading.