Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

An eye-opening look at the workings of the solar system En este ejemplar los ninos encontrarán la historia del universo, descrita con ilustraciones amenas y entretenidas El día y la noche (cuando sale el sol y la luna Un ano de viaje (el movimiento de la tierra en el espacio). Las cuatro diferentes estaciones de la tierra. La función del sol en la tierra (su influencia en las flores y en los animales). La tierra nuestro planeta (descripción de la tierra, sobre sus habitantes y su forma). La luna (su tamano, su aspecto, los viajes que se han realizado y que hay en ella). Los eclipses (como ...

It is the third Monday in January and school is closed. But do you know why? It's Martin Luther King Jr. Day. Turn the pages of this book to find out what dream Dr. King shared with the world, who Mohandas Gandhi was, how one brave woman helped Martin Luther King Jr. change history. Each book in the Holiday Histories series describes one of America's holidays or special days. Explore the history of each day and learn the real reason why it is important. Discover what special meaning each day might have for you.

O es un buen título, desde luego. Suena corto y rotundo, juguetón, es fácil de recordar, y tiene algo de ese enigma indescifrado de los relatos de Alejandro Pedregosa. Historias breves, intensas, portentosas, escritas con la maestría de un artesano minucioso, y que traen un lejano regusto de leyenda, de fábula moral y atribulada. Un retablo de personajes de una existencia efímera que aparecen tras el telón y que saludan desde el escenario antes de enfrentarse a su destino, trágico a veces, con la resignación del penitente. Todo narrado con un estilo preciso y elegante, nunca exento...

Students will learn all about geometric shapes while engaged in reading about Greek Gods and Goddesses, mythology, and the constellations. This Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary, index, and table of contents will increase students' interest level and their...