By studying the properties of the universe's largest pieces we can learn quite a lot about our own world and galaxy. [6:43]

Under the heading, "A Shocking Surprise in Stephan's Quintet" this site examines specific details of an image displaying a galaxy cluster named Stephan's Quintet. The text under the image serves to explain, in great detail, the specifics...

Under the heading, "Galaxies Gather at Great Distances" this site examines (and discusses) an image featuring a group and cluster of galaxies. The text goes on to describe details specific to the image.

Learn what Milky Way galaxy is made of and what it looks like, as well as how it relates to other known galaxies. Read "Questions and answers about the Milky Way" for further information.

A website featuring a collection of images from NASA. Collection includes images of planets, comets, nebulae, galaxies, stars, sun, and spacecrafts.

Under the heading, "Star Clusters Found in the Milky Way" this site examines specific details of an image displaying various clusters of stars in the Milky Way. The text below the image highlights in detail various features of the picture.

The image entitled, "A New Star Cluster" shows the formation of a new group of stars located in the Milky Way galaxy. The text below the image goes into detail on describing the various specifics of the image.

At this site from HubbleSite you can discover the universe by taking a look back toward the beginning of time. Site contains links to information on planets, stars, galaxies, and much more.

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...

In this module you can learn about galaxies, their morphology classification, masses, distances, etc.

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...

The universe goes beyond the sun. Scientists study the amount of mass in the universe, but they also need to measure it in the far outreaches of the universe that are in the dark. Find out how they measure the mass of the entire universe.

In this site, from the SkyServer of the Sloan Digital Sky Survey users hunt for stars, galaxies, quasars, asteroids and meteors. Learn what they look like and how to find them.

Brief, concise facts about Charles Messier and his catalog of comets, galaxies, and other astronomical bodies. Included are photographs of each of the 110 objects listed in his catalog.

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.

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.

Site provides an introduction to dark matter and what it really is. Provides links to a quiz as well as facts about dark matter. Offers links to additional resources as well as related topics.

Dark matter:10

This site from NASA's Space Place is geared towards early elementary learners. It offers detailed instructions for crafts and activities related to space, games and a teacher resource area. Students can also ask an expert at this site.

Are you looking for information on Charles Messier? This site includes a detailed biography of his life along with a timeline, how to conduct a Messier Marathon, and photographs of the astronomical objects in Messier's catalog.

In this site, from the SkyServer of the Sloan Digital Sky Survey users hunt for stars, galaxies, quasars, asteroids and meteors. Learn what they look like and how to find them.

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.