At the end of this unit, you should be able to draw diagrams explaining how the appearance of the moon, as viewed from earth, changes over time.

You could also make your own observations of the moon over the next month.

There are some excellent sites explaining this topic. Some of them are listed below.

• A site with an excellent animation
• A US Navy site
• a site showing observations of the phases of Pluto's moon, Charon
• Nova site "To the Moon" information, videos and quizzes

If you find any other good ones, please submit the information in the text box below.