Download E-books Existence PDF

By David Brin

Bestselling, award-winning futurist David Brin returns to globe-spanning, excessive notion SF with life.

Gerald Livingston is an orbital rubbish collector. For 100 years, humans were leaving behind issues in area, and a person has to scrub it up. yet there is something spinning a little larger than he expects, whatever that won't at the many years' outdated orbital maps. An hour after he grabs it and brings it in, rumors fill Earth's infomesh approximately an "alien artifact."

Thrown into the maelstrom of globally shared event, the Artifact is a game-changer. A message in a bottle; an alien tablet that wishes to speak. the realm reacts as people constantly do: with worry and desire and selfishness and love and violence. And insatiable curiosity.

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Download E-books Time Travel and Warp Drives: A Scientific Guide to Shortcuts through Time and Space PDF

By Allen Everett

To see video demonstrations of key options from the publication, please stopover at this web site: 

Sci-fi makes it glance really easy. obtain a misery name from Alpha Centauri? No challenge: punch the warp force and you are there in mins. dealing with a disaster that can not be prevented? simply pop again within the timestream and forestall it sooner than it starts off. yet for these people now not fortunate sufficient to dwell in a science-fictional universe, are those principles only flights of fancy—or may well it fairly be attainable to shuttle via time or take shortcuts among stars?

Cutting-edge physics will not be capable of solution these questions but, however it does supply up a few tantalizing chances. In Time shuttle and deform Drives, Allen Everett and Thomas A. Roman take readers on a transparent, concise travel of our present knowing of the character of time and space—and even if we'd be capable of bend them to our will. utilizing no math past highschool algebra, the authors lay out an approachable rationalization of Einstein's precise relativity, then go through the primary variations among touring ahead and backward in time and the astonishing theoretical connection among going again in time and touring quicker than the rate of sunshine. They survey quite a few attainable time machines and deform drives, together with wormholes and distort bubbles, and, in a dizzyingly inventive bankruptcy, think the paradoxes which could plague an international the place time commute used to be possible—killing your personal grandfather is just one of them!

Written with a mild contact and an irrepressible love of the thrill of sci-fi scenarios—but firmly rooted within the most recent technological know-how, Time trip and distort Drives will be a pleasant discovery for any technological know-how buff or armchair chrononaut.

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Download E-books From Eudoxus to Einstein: A History of Mathematical Astronomy PDF

By C. M. Linton

Due to the fact that people first regarded in the direction of the heavens, they've got tried to foretell and clarify the motions of the sunlight, moon, and planets. This e-book describes the theories of planetary movement which have been constructed in the course of the a long time, from the homocentric spheres of Eudoxus to Einstein's normal conception of relativity. It emphasizes the interplay among development in astronomy and in arithmetic, demonstrating how the 2 were inextricably associated due to the fact that Babylonian occasions.

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Download E-books Destination Mars: New Explorations of the Red Planet PDF

By Rod Pyle

Within the subsequent decade, NASA, on its own and in collaboration with the ecu area supplier, is making plans at the very least 4 separate missions to Mars. basically, intriguing occasions are forward for Mars exploration. this can be an insider’s inspect the superb initiatives now being constructed the following and overseas to go to the mythical pink planet. Drawing on his contacts at NASA and the Jet Propulsion Laboratory, the writer presents lovely insights into the historical past of Mars exploration and the problems and risks of touring there.

After an pleasing survey of the human fascination with Mars over the centuries, the writer deals an creation to the geography, geology, and water procedures of the planet. He then in short describes the numerous winning missions by means of NASA and others to that far-off international. yet failure and frustration additionally get their due. because the writer makes transparent, going to Mars isn't really, and not can be, effortless. Later within the ebook, he describes intimately what each one upcoming undertaking will contain.

In the second one half the e-book, he bargains the reader a glimpse contained in the international of Earth-based "Mars analogs," areas on the earth the place scientists are undertaking study in adversarial environments which are eerily "Martian." eventually, he constructs a possible situation of a crewed excursion to Mars, in order that readers can see how prior robot missions and human Earth simulations will healthy jointly.

All this can be punctuated via quite a few firsthand interviews with many of the most interesting Mars explorers of our day, together with Stephen Squyres (Mars Exploration Rover), Bruce Murray (former director of the Jet Propulsion Laboratory), and Peter Smith (chief of the Mars Phoenix Lander and the impending OSIRIS-REx missions). those stellar participants provide us an insider’s view of the problems and rewards of roaming the crimson planet.

The author’s infectious enthusiasm and firsthand wisdom of the foreign area mix to make a uniquely beautiful and available publication approximately Mars.

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Download E-books Space Program Management: Methods and Tools (Space Technology Library) PDF

By Marcello Spagnulo

Starting with the fundamental components that differentiate area courses from different administration demanding situations, area software administration explains via thought and instance of genuine courses from world wide, the philosophical and technical instruments had to effectively deal with huge, technically advanced house courses either within the govt and advertisement surroundings. Chapters tackle either structures and configuration administration, the administration of danger, estimation, size and keep an eye on of either investment and this system agenda, and the constitution of the aerospace world wide.

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Download E-books The Heavenly Writing: Divination, Horoscopy, and Astronomy in Mesopotamian Culture PDF

By Francesca Rochberg

Celestial phenomena in historic Mesopotamia used to be saw and interpreted as indicators from the gods in addition to actual phenomena. touching on a few of the methods the heavens have been pondered and understood, this learn lines the emergence of private astrology from the culture of celestial divination and the way astronomical technique built for horoscopes. Its significance lies in its therapy of Babylonian celestial sciences (celestial divination, horoscopy, and astronomy) as matters suitable to the heritage of technology and tradition.

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Download E-books How It Ends: From You to the Universe PDF

By Chris Impey

“Remarkably upbeat, and imbued with wit, knowledge and a palpable experience of awe over our universe.”―Tucson Weekly

such a lot folks are conscious of our personal mortality, yet few between us comprehend what technology, with insights yielded from groundbreaking new examine, has to claim approximately endings on a bigger scale. input astronomer Chris Impey, who chronicles the loss of life of the full shebang: person, species, bio- sphere, Earth, solar, Milky method, and, eventually, the total universe.

With a hearty dose of humor, How It Ends illuminates every little thing from the applied sciences of human existence extension and the evolutionary fingers race among microbes and males to the inescapable dimming of the solar and the last word “big rip,” giving us a unprecedented glimpse right into a universe with out us. sixty eight black-and-white illustrations

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