Uneasy about her new substitute teacher, Susan Simmons' suspicions about Mr. Smith are confirmed when she discovers he is an alien determined to bring some sixth-grade specimens back to his planet.

Profiles each of the planets in Earth's solar system, including Pluto, Ceres, Eris, Haumea, MakeMake, the sun, the Oort cloud, comets, and more.

"Presents information about icy dwarf planets, including fast facts, history, and technology used to study them"--Provided by publisher.

Carbon dioxide is out of control on Earth, and the fate of humankind rests in the paws of four experimental, untested Animal Astronauts (AlphaWolf, SmartHawk, LaserShark, and StinkBug) who are seeking another habitable planet; first destination is the Plant Planet which at first looks perfect, except that the abundant plant life can think for itself--and it thinks that it really does not like the AstroNuts.

Discusses the work of astrobiologists who are actively searching for signs of life within and beyond our solar system.

Christina Starspeeder, legendary Padawan and sister to Victor Starspeeder, has graduated from the Jedi Academy at Coruscant. But that doesn't mean her education is over since Christina is now a student at the advanced Jedi Academy at Jedha City. It's super big, and super stressful. At Coruscant, Christina was top of her class. But at this new school, it seems like everyone is on a different level. To make matters worse, she's apprenticing under legendary...

Before Peter discovers his newest teacher glows in the dark, he is flying away from Earth in a spaceship full of aliens.

Discusses the roles of several NASA spacecrafts which carried out probes during explorations of the planets.