Mercury--rocky and hot. Developing readers learn about our solar system's smallest planet and its key features in this low-level Spanish beginning reader.Orbiting closest to our sun, Mercury is about the size of Earth's moon. Its gray, wrinkly surface is covered in craters and cliffs. Early readers discover new science vocabulary about Mercury's geography, place in the solar system, and latest spacecraft to visit it.A search-and-find feature reinforces new concepts to build reading success while close-up images captivate young astronomers. A North American Spanish translation.