Throughout this text, words will appear that are highlighted. Some will lead to further text, figures, illustrations, or links to other systems. Others will be references to a glossary. For instance, here you see the word astronomy. By clicking on this term, you will be sent to a definition of "astronomy." Feel free either to follow, or to ignore, these references, as you choose.
Beyond this textbook itself, you may wish to investigate other web pages related to education in astronomy. Click here for a List of Other Astronomy Links.