Introductory Astronomy: Earth - Moon - Sun System

For more information on any of the topics listed below, simply click on the appropriate highlighted phrase.

  • Phases of the Moon This page talks about what causes the phases of the moon and what information we can learn from them.
  • Earthshine This page tells you what earthshine is and when you can see it.
  • Eclipses This page has of important information about eclipses.

After you review these sections, try a few sample questions to test your understanding. These questions are typical of questions given in introductory astronomy course exams. They are meant only to give you an idea of what kinds of questions MIGHT be on your exam. Just because these questions are here does NOT mean that you will have questions like them on your exam, NOR does it even mean that you will have questions on these topics on your exam. They are just PRACTICE questions!