Pluto: A Dwarf Planet
All the librarians on the planet suddenly cried out when Pluto was reclassified as a Dwarf Planet in 2006. Now all of the planet and solar system books are obsolete! This makes Pluto a good example to use as a teaching point about Copyright date when teaching Works Cited. Read my blog post about how I teach this lesson.

Source: NASA

updated to MLA 8 Works Cited format from Purdue OWL
How to fold the book using the above template.

More Resources about Pluto:
Pluto in a Minute Playlist on Youtube from NASA
New Horizons Videos from NASA
Solar System Report