What Is a Planet? Lithograph
Front of the What Is a Planet? lithograph

The information in this document was accurate as of the original publication date.

Audience: Educators and Students
Grades: All Grades
Product Number: LG-2009-09-582-HQ

The front of this lithograph features size comparisons of dwarf planets Eris, Pluto and Ceres. The back of the lithograph explains the definition of "planet" and how the International Astronomical Union came to classify objects as planets or dwarf planets.

What Is a Planet? Lithograph  [182KB PDF file]
> View high resolution  [1MB PDF file]

This lithograph is part of the Our Solar System lithograph set.