Mark J. Harasymiw 
Matemáticas en Saturno (Math on Saturn) [PDF ebook] 

The planet Saturn, with its magnificent rings, is one of the most jawdropping sights in our solar system. The striking photographs in this attractive volume invite readers to dive into the essential facts and science vocabulary in the text. They”ll also be invited to solve math problems involving Saturn in which they”ll learn more data such as about Saturn”s 29 1/2 year trip around the sun. Saturn”s rings, moons, and atmosphere are some of the topics that future astronomers will be introduced to in this valuable volume about the sixth planet from the sun.