Ecliptic


 * Wikipedia has an article called Ecliptic
 * See Ecliptic/Quizzes for quizzes pertaining to that article.

For related Wikipedia articles, see
 * Eclipse
 * Saros (astronomy)
 * line of nodes.
 * Wikipedia articles on this topic suffer from a paucity of images. See for example:
 * http://people.highline.edu/iglozman/classes/astronotes/media/eclipse_nodes.gif
 * http://zebu.uoregon.edu/~imamura/121/lecture-2/eclipse.html
 * http://sixdayscience.com/curriculum/textbooks/chapter-3/
 * http://epod.usra.edu/.a/6a0105371bb32c970b0154330dc330970c-pi montage of lunar eclipse