Millions of people watch images captured by the Mars rovers with fascination, inciting their interest in other planets and space technology. There are still many questions remaining about space and space exploration, some quite mysterious. Readers see these queries addressed, including whether we'll be able to settle on another planet someday, when our sun may burn out, and how a black hole forms. Captivating photographs, many from NASA's archives, accompany the text and highlight the breathtaking beauty of space. * High-interest topics attract reluctant readers * Vivid photographs aid in reading comprehension * Graphic organizers recap ideas * Suggested reading and websites provide readers with further learning opportunities * Glossary includes essential terms in science vocabulary