NASA
Nasa Star Child: The Universe (Level 1)
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.
Texas Education Agency
Texas Gateway: What Is the Universe?
The following tutorial is an explanation of what the universe is composed of.
CPALMS
Florida State University Cpalms: Florida Students: What's the Matter in the Galaxy?
A tutorial that looks at the components within a galaxy such as gas, dust, stars and objects that orbit stars. A PDF file of the tutorial is available.
Other
Physics.org: A Grain of Sand Covers 10,000 Galaxies
A fascinating look at how big our solar system really is. Shows how we can only see a tiny bit of our vast universe.
PBS
Pbs: Nova Online: Galaxies, Clusters, and Superclusters
PBS site explores these building blocks of the universe as well as their various types and clusters.
PBS
Pbs Nova Online: Spin a Spiral Galaxy
PBS site provides various views of spiral galaxies. (Quick Time required) With this technology, you can manipulate the image to spin it around and look at it from various angles.
Space Telescope Science Institute
Nasa: Hubble Space Telescope: Galaxies
At this site from HubbleSite you can learn all about galaxies and black holes. Click on the movie link and discover how old the universe is or study about what happens when two galaxies collide!
Australian Museum
Australian Museum: The Earth: The Universe
Basic information about the universe, its origin and composition. Also includes information about galaxies, stars, and the sun.
Khan Academy
Khan Academy: Answers to Exploration Questions: Galaxies
Answers to the exploration questions about galaxies can be found on this site.
TED Talks
Ted: Ted Ed: How Small Are We in the Scale of the Universe?
In 1995, scientists pointed the Hubble Telescope at an area of the sky near the Big Dipper. The location was apparently empty, and the whole endeavor was risky- what, if anything, was going to show up? But what came back was nothing...
TED Talks
Ted: Ted Ed: What We Can Learn From Galaxies Far, Far Away
By studying the properties of the universe's largest pieces we can learn quite a lot about our own world and galaxy. [6:43]
CK-12 Foundation
Ck 12: Earth Science: Expansion of the Universe
[Free Registration/Login may be required to access all resource tools.] Recognize how redshift suggests the universe is expanding.
NASA
Nasa Star Child: The Universe (Level 2)
This site provides a description of the universe and what it contains. Includes links to definitions, activities, and an audio song. Printable version available.
A&E Television
History.com: The Space Race: Interactive Universe
A virtual journey through space offers photos and facts about Earth and its neighboring planets, comets, other celestial bodies of the Solar System, and the Milky Way and Andromeda galaxies.
Other
University of Cambridge Cosmology: Galaxies
This site from the University of Cambridge allows you to view information on spiral, elliptical, and Milky Way galaxies, as well as galaxy clusters. Provides basic facts about each one.
Space Telescope Science Institute
Galaxy Hunter: A Cosmic Photo Safari
Travel the universe and learn about galaxies. Investigate Hubble Deep Field observations to learn more.
University of California
University of California Berkeley: Classifying Galaxies
Find out how galaxies are classified and then see if you can apply that knowledge to identify the different types of galaxies. In addition to explaining Hubble's galaxy classification system, the site has links to Hubble Space Telescope...
Other
University of Leicester: Irregular Galaxies
Provides a general overview of irregular galaxies, including a specific look at type I and type II irregulars.
Other
University of Leicester: Spiral Galaxies
Provides a general overview of spiral galaxies, including descriptions of the different classes of spiral galaxy.
NASA
Nasa: Imagine the Universe: Active Galaxies and Quasars
Describes quasars as being classified within the category of an active galaxy. A description of the emergence of high-energy. Definitions of key words are provided.gamma-ray quasars as an important component of the gamma-ray sky.
Other
Sloan Digital Sky Survey: Galaxy Zoo
Explore the universe like you have never seen it. Take part in classifying images of galaxies taken from the Hubble telescope archives. This is a crowdsourced scientific research project.
Harvard University
Chandra X Ray Observatory: Video Podcasts: The Incredible Two Inch Universe
A set of podcasts outlining a four-step process for understanding the vastness of our universe, from the vicinity of the Earth and Moon, out into distant galaxies. Downloadable instructions and a handout are included, as well as...
NASA
Astronomy Picture of the Day: Quasar Galaxy Collision
An image of a quasar. The large redshifts imply that quasars lie near the edge of the observable universe and must emit tremendous amounts of energy. There are also many embedded links to related topics.
NASA
Nasa: Imagine the Universe: Fa Qs on Quasars
A list of answers to many questions related to quasars and active galaxies.