Isaac Asimov

A millennium into the future, two advancements have altered the course of human history:  the colonization of the Galaxy and the creation of the positronic brain.  On the beautiful Outer World planet of Solaria, a handful of human colonists lead a hermit-like existence, their every need attended to by their faithful robot servants.  To this strange and provocative planet comes Detective Elijah Baley, sent from the streets...

La «Trilogía de la Fundación» está considerada la mejor serie de la ciencia ficción universal. Como tal, fue galardonada en 1966 con un premio Hugo, y ahora reunida en un único volumen: una lectura imprescindible para los amantes del género.

El hombre se ha dispersado por toda la galaxia. La capital del Imperio es Trántor, nido de intrigas y corrupción. Gracias a su ciencia, fundada en el estudio matemático de los hechos

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Fearing a violent confrontation between Earthmen and Spacers, Detective Baley and his new partner, a robot made in the image of the victim, investigate the murder of a Spacetown scientist.

A fabulous adventure into the last frontier of man!
Attention! This is the last message you will receive until your mission is completed. You have sixty minutes once miniaturization is complete. You must be out of Benes’ body before then. If not, you will return to normal size and kill Benes regardless of the success of the surgery.
Four men and one woman reduced to a microscopic fraction of their original size, boarding...

Describes the characteristics and movements of the planet Neptune and how we found out about it

Presents a variety of astronomy projects, including creative writing and drawing assignments, modelmaking, sky observation, and experiments

"The Foundation lies in ruins--destroyed by a mutant mind bent on humanity's annihilation. But it's rumored that there's a Second Foundation hidden somewhere at the end of the Galaxy, established as insurance to preserve the knowledge of mankind. Now a desperate race has begun between the survivors of the First Foundation and an alien entity to find this last flicker of humanity's shining past--and future hope. Yet the key to it all might be a fourteen-year-old...

"Led by its founding father, the psychohistorian Hari Seldon, and utilizing science and technology, the Foundation survived the greed and barbarism of its neighboring warrior-planets. Now cleverness and courage may not be enough. For the Empire--the mightiest force in the Galaxy--is even more dangerous in its death throes. Even worse, a mysterious entity called the Mule has appeared with powers beyond anything humanly conceivable. Who--or what--is...

This stand-alone novel is widely regarded as Asimov's best science fiction novel. Andrew Harlan is an Eternal, a member of the elite of the future. One of the few who live in Eternity, a location outside of place and time, Harlan's job is to create carefully controlled and enacted Reality Changes. These Changes are small, exactingly calculated shifts in the course of history, made for the benefit of humankind. Though each Change has been made for

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A step-by-step description of how an eclipse occurs and the differences between a lunar and a solar eclipse