Presents an investigation of asteroids and comets, discussing ancient beliefs about the appearance of comets, their demystification with the emergence of modern astronomy, how they formed, and their different types and composition, and looking at the possibilities for mining asteroids, as well as what happens when they hit Earth.
Marlene, a fifteen-year-old Rotorian girl, learns of the threat Nemesis poses to the Earth and its people. She is stopped from warning Earth, but when she discovers Rotor is also in danger she knows she must save both Earth and Rotor from the death star, Nemesis.
Examines the physical characteristics and conditions of comets, asteroids, and meteorites, describing their position and movements in relation to the sun and planets and surveying humanity's attempts to penetrate their mysteries.
Discusses the methods used by scientists of the last two centuries to interpret the fossil evidence of dinosaurs, and explores theories as to why they became extinct.
Explores the dangers that are floating through space, such as asteroids, space junk, and satellites, discussing where they came from and how scientists watch for them.
Provides information on comets, asteroids, and meteors, explaining what they are, where they come from, and how they behave, and includes a fact file, glossary, and resources.
