Learn about the lives of stars, and how stars and planets form. The Interactive activity, 'Planet Families' requires Adobe Flash and cannot be launched.

In ancient times only five planets were known: Mercury, Venus, Mars, Jupiter, and Saturn. Learn about Greek astronomer Ptolemy's theory for the solar system that was to survive for fourteen centuries.

When you are in the city, only a few of the brightest stars are visible. But when you are in the country, you can see many more stars than you can count. Sometimes you can even see the bright belt of our galaxy, the Milky Way. In this...

Did you know that ancient astronomers could measure the distance to other stars? They could also distinguish between stars and planets. How could they do that without modern technology of telescopes? See if you can discover the link...

Take a virtual tour of the solar system starting with detailed information about the sun.

Besides an introduction to exhibitions and events at the museum, the site provides a guide to stargazing, an astronomy FAQ, space news, virtual tours (see site map) and research resources (including Chinese-English star and constellation...

This hands-on astronomy activity lets learners hunt for different objects in the night sky that contribute to stellar and planetary formation, using a Treasure List. They will learn how stars and their planets form and will find objects...

Material to begin an exploration of the Solar System: the characteristics of the planets, theories about planet formation, and more. An hour-long video is accompanied by learning goals, an outline and overview, details on star formation,...

Teach the concept of scale models and the size of the solar system through this extensive lesson plan. Students will learn about scale models, estimate which objects to use to create a scale model of Earth and Sun, and figure out how far...

A basic overview of supernovas. Links to more information about starts, planets and other objects in our solar system and galaxy are included.

During this lesson plan, students have the opportunity to explore comets. By navigating the Internet, viewing a slideshow, and participating in a videoconference with NASA, students will discover what comets are all about.

Did you know you can see many satellites with the naked eye? Try this activity and find out for yourself!

A collection of audio lectures from an introduction to astrophysics course taught at the University of California, Berkeley. The course discusses the solar system, stars, quantum mechanics, gravitation, and cosmology focusing on how...

Provides facts about the Universe, Jupiter, the Milky Way Galaxy, and Superclusters.