Once upon a time, long ago, way back in February of 1930, the Pluto formerly known as a planet was first sighted by astronomer Clyde Tombaugh.  It was the smallest planet out in the far reaches of our solar system, but it was recently reclassified as a dwarf planet. 

Find books about Pluto in our library catalog, or search for Pluto in one of the databases available on our Kids’ Homework Help page.