Download E-books The Moon that Wasn't: The Saga of Venus' Spurious Satellite (Science Networks. Historical Studies) PDF

By Helge Kragh

The planet Venus is the nearest neighbour to the Earth and in numerous respects just like our globe. It revolves round the sunlight at an ordinary distance of zero. seventy two astronomical devices, in an elliptical orbit of eccentricity zero. 007. The corresponding three numbers for the Earth are 1 and nil. 017. The suggest density of Venus is five. 2 g/cm , three that of the Earth five. five g/cm . Venus’ acceleration of gravity at its equator is eight. nine 2 2 m/s , in comparison with nine. eight m/s on the Earth. The break out speed is 10. four km/s, whereas the corresponding ?gure of the Earth is eleven. 2 km/s. even though the mass of Venus is just a little smaller than that of the Earth – the ratio is M /M =0. 815 V E – the diameters of the 2 planets are nearly a similar. In different phrases, Venus is certainly a sister planet of the Earth. In previous instances, while virtually not anything used to be identified concerning the actual con- tions of Venus, the similarity seemed even greater than this day. not just was once Venus’ interval of rotation regarded as on the subject of that of the Earth, it used to be additionally p- sible (and certainly universal) to visualize clever existence on Venus.

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Download E-books Spacecraft Attitude Determination and Control (Astrophysics and Space Science Library) PDF

This vintage booklet is the 1st accomplished presentation of knowledge, idea, and perform in perspective research. It was once written by way of 33 senior technical employees individuals within the Spacecraft angle division of the pc Sciences company and comprises their adventure in helping greater than 30 area missions. as a result of huge cross-references, entire index, and thirteen technical appendices, this e-book might be both a self instructing textual content, or a reference handbook.

Among its exact beneficial properties are orthographic globe projections to put off confusion in vector drawings; discussions of universal information anomalies, information validation, angle undefined, and linked mathematical versions; and a presentation of recent geometrical approaches for project research and perspective accuracy experiences that may get rid of many advanced simulations.

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Download E-books Into That Silent Sea: Trailblazers of the Space Era, 1961-1965 (Outward Odyssey: A People's History of Spaceflight) PDF

By Francis French

It used to be a time of daring new expertise, historical moments, and foreign jousting at the ultimate frontier. however it was once additionally a time of human drama, of moments much less public yet no much less dramatic within the lives of these who made the golden age of area flight ensue. those are the moments and the lives that Into That Silent Sea captures, a booklet that tells the intimate tales of the lads and ladies, American and Russian, who made the gap race their very own and gave the period its compelling character.
 
These pages chronicle a assorted and riveting cavalcade of human tales, together with a glance at Yuri Gagarin’s harrowing early life in war-ravaged Russia and Alan Shepard’s enterprise buy at the American dream. It additionally examines the debatable occupation of cosmonaut Valentina Tereshkova, the 1st girl in house, and the amazing fight and supreme unhappiness of her American opposite numbers. It attempts to discover the reality at the back of the allegations that shadowed Gus Grissom and Scott chippie after which permits the reader to percentage the heart-stopping suspense of Alexei Leonov’s near-fatal first area stroll. via dozens of interviews and entry to Russian and American legit files and relatives documents, the authors deliver to existence the reviews that formed the lives of the 1st astronauts and cosmonauts and endlessly replaced their international and ours.
 

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Download E-books Comets And Their Origin: The Tools To Decipher A Comet PDF

By Uwe Meierhenrich

Divided into components, the 1st 4 chapters of Comets and their beginning discuss with comets and their formation as a rule, describing cometary missions, comet distant observations, astrochemistry, man made comets, and the chirality phenomenon. the second one half covers the cometary ROSETTA undertaking, its release, trip, medical pursuits, and instrumentations, in addition to the touchdown state of affairs on a cometary nucleus. alongside the way in which, the writer provides normal questions in regards to the starting place of terrestrial water and the molecular beginnings of lifestyles in the world, in addition to how the tools used on an area challenge like ROSETTA will help resolution them. The textual content concludes with a bankruptcy on what scientists anticipate from the ROSETTA challenge and the way its info will impression our existence on Earth.
for this reason, the writer elucidates hugely topical and interesting wisdom to scientists and scholars of varied medical backgrounds, letting them paintings with ROSETTA's data.

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Download E-books The Invisible Universe: The Story of Radio Astronomy (2nd Edition) PDF

By Gerrit Verschuur

This is the tale of radio astronomy, of ways radio waves are generated via stars, supernova, quasars, colliding galaxies, and by means of the very beginnings of the universe itself. This revised e-book presents an replace at the country of radio astronomy and people sections now not considered as leading edge were got rid of. With this e-book, geared toward a lay viewers, you study what astronomers are doing with these large dishes. With every one of those observatories, the scientists gather and research their info, "listening" to the radio indications from house, to be able to research what's available in the market, and maybe even if another individual might be listening as well.

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Download E-books The Meaning and Value of Spaceflight: Public Perceptions (Space and Society) PDF

This ebook offers the main critical and accomplished learn, through a ways, of yank public perceptions in regards to the that means of house exploration, interpreting huge troves of questionnaire info gathered by means of many researchers and polling businesses over a span of six a long time and anchored in influential social technology theories. It does not easily record the odds who held numerous reviews, yet employs refined statistical concepts to reply to profound questions and accomplish clean discoveries.

Both the Bush and the Obama administrations have reduce critically on primary examine in house technological know-how and engineering. figuring out higher what house exploration potential for electorate can give a contribution to charting a possible yet innovative direction. because the finish of the gap Race among the U.S. and the USSR, social scientists have virtually thoroughly overlooked area exploration as an issue for severe research and this e-book seeks to restore that sort of contribution.

The writer communicates the insights in a lucid kind, not just intelligible yet fascinating to readers from quite a few backgrounds.

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

By C. M. Linton

Seeing that people first seemed in the direction of the heavens, they've got tried to foretell and clarify the motions of the solar, moon, and planets. This booklet describes the theories of planetary movement which were constructed throughout the a long time, from the homocentric spheres of Eudoxus to Einstein's common concept of relativity. It emphasizes the interplay among development in astronomy and in arithmetic, demonstrating how the 2 were inextricably associated seeing that Babylonian occasions.

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Download E-books The Hunt for Vulcan: . . . And How Albert Einstein Destroyed a Planet, Discovered Relativity, and Deciphered the Universe PDF

By Thomas Levenson

The fascinating, all-but-forgotten tale of Isaac Newton, Albert Einstein, and the hunt for a planet that by no means existed

For greater than fifty years, the world’s best scientists sought for the “missing” planet Vulcan, whose life was once mandated by means of Isaac Newton’s theories of gravity. numerous hours have been spent at the hunt for the elusive orb, and a few of the era’s such a lot expert astronomers even claimed to have came across it.

there has been only one challenge: It used to be by no means there.

In The Hunt for Vulcan, Thomas Levenson follows the visionary scientists who inhabit the tale of the phantom planet, beginning with Isaac Newton, who in 1687 supplied a proof for all subject in movement through the universe, resulting in Urbain-Jean-Joseph Le Verrier, who nearly centuries later outfitted on Newton’s theories and found Neptune, changing into the main recognized scientist on the planet. Le Verrier tried to surpass that triumph by means of predicting the lifestyles of yet one more planet in our sunlight approach, Vulcan.

It took Albert Einstein to figure that the secret of the lacking planet was once an issue now not of measurements or math yet of Newton’s idea of gravity itself. Einstein’s basic concept of relativity proved that Vulcan didn't and will no longer exist, and that the hunt for it had in simple terms been a quirk of working below the inaccurate set of assumptions concerning the universe. Levenson tells the formerly untold story of the way the “discovery” of Vulcan within the 19th century set the level for Einstein’s huge leap forward, the best person highbrow fulfillment of the 20 th century.

A dramatic human tale of an epic quest, The Hunt for Vulcan deals perception into how technology fairly advances (as against the best way we’re taught approximately it in class) and the way the simplest paintings of the best scientists finds an artist’s sensibility. starting a brand new window onto our international, Levenson illuminates a few of our such a lot iconic rules as he recounts one of many strangest episodes within the heritage of science.

Praise for The Hunt for Vulcan

“Delightful . . . an enthralling story approximately an all-but-forgotten episode in technology history.”—The Wall road Journal

“Engaging . . . At middle, this can be a tale approximately how technological know-how advances, one perception at a time. however the immediacy, virtually romance, of Levenson’s writing makes it nearly novelistic.”—The Washington Post

“A brief, fantastically produced publication that tells a cautionary story. . . . Levenson is a breezy author who renders complicated principles in down-to-earth language.”—The Boston Globe

“Looping via technological know-how background from Isaac Newton onwards, Levenson elegantly finds the evolutionary nature of medical thought.”—Nature

“This pleasant and enlightening drama tells the tale of the search for a planet that didn't exist and the way Einstein resolved the secret with the main appealing idea within the heritage of science.”—Walter Isaacson

“Equal to the simplest technology writing I’ve learn wherever, by way of any writer. fantastically composed, wealthy in old context, deeply researched, it really is, certainly, nice storytelling.”—Alan Lightman, writer of The unintentional Universe

“Levenson tells us the place Vulcan got here from, the way it vanished, and why its spirit lurks at the present time. alongside the way in which, we examine greater than a little simply how technology works—when it succeeds in addition to whilst it fails.”—Neil deGrasse Tyson

“Science writing at its top. This booklet is not only discovered, passionate, and witty—it is profoundly wise.”—Junot Díaz

From the Hardcover edition.

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