Ecliptic

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

For related Wikipedia articles, see

*     * w:Eclipse
* w:Saros (astronomy)
* w: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