Twelve-year-old Arcturus Betelgeuse Chambers' quest to find life on other planets seems at an end when his parents decide to move to Las Vegas, but while they look for a house he stays with his neighbor, an astronaut who soon becomes a friend.

A small, but plucky, mouse named Meteor is sure that he can help the Space Shuttle astronauts, and ends up saving the whole mission.

When Cat-Stro-Bot gets into trouble while helping the CatStronauts team with their research on Europa, the CatStronauts defy mission control and undertake a secret mission to save their friend on Jupiter's frozen moon.

A little pig imagines what it would be like to be a daring astronaut.

Sworn enemies Space Dog, Astrocat, and Mousetronaut team up to save the Spooniverse.

A mouse stowaway on NASA's first human mission to Mars becomes a hero when one of the landing craft's engines fails. Includes facts about Mars.

So far the AstroNuts have failed to find a suitable planet, but NNASA has come up with a new plan: send the the four animal astronauts back through time on Earth where they are to contact early homo sapiens and somehow set them on a path to a sustainable future--trouble is, humans seem inferior to many of the other species (especially the wolves), so the AstroNuts come up with a Survival of the Fittest Olympics, hoping that with a little help the...

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.

Illustrations and simple, rhyming text reveal the day-to-day lives of cow space explorers, from what they look like, to how they keep busy, to how they deal with a noisy baby.