Pluto Visits Earth! is classified as an Everybody Reads/Picture book, however it is chock full of science factoids.  The story goes that Pluto has heard that he’s been downgraded from a planet to a dwarf planet.  He goes to the other planets to find out why and at each one the reader gets a nugget of knowledge.  Eventually Pluto goes to Earth and finds out eventually that he doesn’t meet all the requirements to be a planet, which is to be able to “use it’s gravity to clear it’s orbit of any asteriods.”  Students will recognize the familiar artwork of Jared Lee because of the Black Lagoon series.  What a gentle, interesting way to learn about the solar system.