What If The Earth Had Two Moons

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What If the Earth Had Two Moons?

Neil F. Comins
What If the Earth Had Two Moons Book PDF

Author : Neil F. Comins
Publisher : Macmillan
Page : 506 pages
File Size : 53,6 Mb
Release : 2010-03-30
Category : Science
ISBN : 9781429957939

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What If the Earth Had Two Moons? by Neil F. Comins Pdf

"What if?" questions stimulate people to think in new ways, to refresh old ideas, and to make new discoveries. In What If the Earth Had Two Moons, Neil Comins leads us on a fascinating ten-world journey as we explore what our planet would be like under alternative astronomical conditions. In each case, the Earth would be different, often in surprising ways. The title chapter, for example, gives us a second moon orbiting closer to Earth than the one we have now. The night sky is a lot brighter, but that won't last forever. Eventually the moons collide, with one extra-massive moon emerging after a period during which Earth sports a Saturn-like ring. This and nine and other speculative essays provide us with insights into the Earth as it exists today, while shedding new light on the burgeoning search for life on planets orbiting other stars. Appealing to adult and young adult alike, this book is a fascinating journey through physics and astronomy, and follows on the author's previous bestseller, What if the Moon Didn't Exist?, with completely new scenarios backed by the latest astronomical research.

When the Earth Had Two Moons

Erik Asphaug
When the Earth Had Two Moons Book PDF

Author : Erik Asphaug
Publisher : HarperCollins
Page : 424 pages
File Size : 50,6 Mb
Release : 2019-10-29
Category : Science
ISBN : 9780062657947

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When the Earth Had Two Moons by Erik Asphaug Pdf

An astonishing exploration of planet formation and the origins of life by one of the world’s most innovative planetary geologists. In 1959, the Soviet probe Luna 3 took the first photos of the far side of the moon. Even in their poor resolution, the images stunned scientists: the far side is an enormous mountainous expanse, not the vast lava-plains seen from Earth. Subsequent missions have confirmed this in much greater detail. How could this be, and what might it tell us about our own place in the universe? As it turns out, quite a lot. Fourteen billion years ago, the universe exploded into being, creating galaxies and stars. Planets formed out of the leftover dust and gas that coalesced into larger and larger bodies orbiting around each star. In a sort of heavenly survival of the fittest, planetary bodies smashed into each other until solar systems emerged. Curiously, instead of being relatively similar in terms of composition, the planets in our solar system, and the comets, asteroids, satellites and rings, are bewitchingly distinct. So, too, the halves of our moon. In When the Earth Had Two Moons, esteemed planetary geologist Erik Asphaug takes us on an exhilarating tour through the farthest reaches of time and our galaxy to find out why. Beautifully written and provocatively argued, When the Earth Had Two Moons is not only a mind-blowing astronomical tour but a profound inquiry into the nature of life here—and billions of miles from home.

What If the Moon Didn't Exist?

Neil F. Comins
What If the Moon Didn t Exist Book PDF

Author : Neil F. Comins
Publisher : Unknown
Page : 0 pages
File Size : 44,6 Mb
Release : 2012-09
Category : Astronomy
ISBN : 1475930941

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What If the Moon Didn't Exist? by Neil F. Comins Pdf

Demonstrates how ten hypothetical situations would affect our planet and life on it. Topics include: what if the moon didn't exist, what if earth were tilted like Uranus, what if a black hole passed through earth, and so on.

What If the Earth Had Two Moons?

Neil F. Comins
What If the Earth Had Two Moons Book PDF

Author : Neil F. Comins
Publisher : Macmillan
Page : 312 pages
File Size : 55,8 Mb
Release : 2010-03-30
Category : Science
ISBN : PSU:000067809127

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What If the Earth Had Two Moons? by Neil F. Comins Pdf

An astronomer and author explores ten examples of what Earth would be like if conditions in the universe were slightly altered, in a fascinating journey into scientific scenarios.

Many Skies

Arthur Upgren
Many Skies Book PDF

Author : Arthur Upgren
Publisher : Rutgers University Press
Page : 216 pages
File Size : 43,5 Mb
Release : 2005-01-18
Category : Nature
ISBN : 9780813553566

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Many Skies by Arthur Upgren Pdf

What if Earth had several moons or massive rings like Saturn? What if the Sun were but one star in a double-star or triple-star system? What if Earth were the only planet circling the Sun? These and other imaginative scenarios are the subject of Arthur Upgren's inventive book Many Skies: Alternative Histories of the Sun, Moon, Planets, and Stars. Although the night sky as we know it seems eternal and inevitable, Upgren reminds us that, just as easily, it could have been very different. Had the solar sytem happened to be in the midst of a star cluster, we might have many more bright stars in the sky. Yet had it been located beyond the edge of the Milky Way galaxy, we might have no stars at all. If Venus or Mars had a moon as large as ours, we would be able to view it easily with the unaided eye. Given these or other alternative skies, what might Ptolemy or Copernicus have concluded about the center of the solar sytem and the Sun? This book not only examines the changes in science that these alternative solar, stellar, and galactic arrangements would have brought, it also explores the different theologies, astrologies, and methods of tracking time that would have developed to reflect them. Our perception of our surroundings, the number of gods we worship, the symbols we use in art and literature, even the way we form nations and empires are all closely tied to our particular (and accidental) placement in the universe. Many Skies, however, is not merely a fanciful play on what might have been. Upgren also explores the actual ways that human interferences such as light pollution are changing the night sky. Our atmosphere, he warns, will appear very different if we have belt of debris circling the globe and blotting out the stars, as will happen if advertisers one day pollute space with brilliant satellites displaying their products. From fanciful to foreboding, the scenarios in Many Skies will both delight and inspire reflection, reminding us that ours is but one of many worldviews based on our experience of a universe that is as much a product of accident as it is of intention.

Lunar Sourcebook

Grant Heiken,David Vaniman,Bevan M. French
Lunar Sourcebook Book PDF

Author : Grant Heiken,David Vaniman,Bevan M. French
Publisher : CUP Archive
Page : 796 pages
File Size : 41,8 Mb
Release : 1991-04-26
Category : Science
ISBN : 0521334446

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Lunar Sourcebook by Grant Heiken,David Vaniman,Bevan M. French Pdf

The only work to date to collect data gathered during the American and Soviet missions in an accessible and complete reference of current scientific and technical information about the Moon.

Moons: A Very Short Introduction

David A. Rothery
Moons A Very Short Introduction Book PDF

Author : David A. Rothery
Publisher : Oxford University Press
Page : 144 pages
File Size : 40,9 Mb
Release : 2015-11-26
Category : Science
ISBN : 9780191054228

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Moons: A Very Short Introduction by David A. Rothery Pdf

Proving to be both varied and fascinating, moons are far more common than planets in our Solar System. Our own Moon has had a profound influence on Earth, not only through tidal effects, but even on the behaviour of some marine animals. Many remarkable things have been discovered about the moons of the giant outer planets from Voyager, Galileo, Cassini, and other spacecraft. Scientists have glimpsed volcanic activity on Io, found oceans of water on Titan, and captured photos of icy geysers bursting from Enceladus. It looks likely that microbial life beyond the Earth may be discovered on a moon rather than a planet. In this Very Short Introduction David Rothery introduces the reader to the moons of our Solar System, beginning with the early discoveries of Galileo and others, describing their variety of mostly mythological names, and the early use of Jupiter's moons to establish position at sea and to estimate the speed of light. Rothery discusses the structure, formation, and influence of our Moon, and those of the other planets, and ends with the recent discovery of moons orbiting asteroids, whilst looking forward to the possibility of finding moons of exoplanets in planetary systems far beyond our own. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

Lunar Abundance

Ezzie Spencer
Lunar Abundance Book PDF

Author : Ezzie Spencer
Publisher : Running Press Adult
Page : 240 pages
File Size : 53,7 Mb
Release : 2018-03-06
Category : Body, Mind & Spirit
ISBN : 9780762463565

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Lunar Abundance by Ezzie Spencer Pdf

Lunar Abundance is a beautiful and practical guide for today's women on cultivating peace, purpose, and abundance in both their personal and professional lives, guided by the phases of the moon. In a world in which women feel increasingly disconnected-from their inner selves, each other, and the world, Lunar Abundance offers a path to reconnection, with results that you can actually see. It shows how by tuning into the natural rhythm of lunar ebbs and flows, you can connect with work, relationships, your body, and surroundings on a higher level than ever before, becoming more productive and self-aware in the process. Filled with inspirational photography and interactive features, it's also a practical guide to self-care that will help you summon your true potential and create a better life for you and for those in your orbit. This beautiful book is perfect for any woman seeking holistic wellness and unique inspiration to feed mind, body, and soul.

Bad Astronomy

Philip C. Plait
Bad Astronomy Book PDF

Author : Philip C. Plait
Publisher : John Wiley & Sons
Page : 288 pages
File Size : 41,8 Mb
Release : 2002-10-08
Category : Science
ISBN : 047142207X

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Bad Astronomy by Philip C. Plait Pdf

Advance praise for Philip Plait s Bad Astronomy "Bad Astronomy is just plain good! Philip Plait clears up everymisconception on astronomy and space you never knew you sufferedfrom." --Stephen Maran, Author of Astronomy for Dummies and editorof The Astronomy and Astrophysics Encyclopedia "Thank the cosmos for the bundle of star stuff named Philip Plait,who is the world s leading consumer advocate for quality science inspace and on Earth. This important contribution to science willrest firmly on my reference library shelf, ready for easy accessthe next time an astrologer calls." --Dr. Michael Shermer,Publisher of Skeptic magazine, monthly columnist for ScientificAmerican, and author of The Borderlands of Science "Philip Plait has given us a readable, erudite, informative,useful, and entertaining book. Bad Astronomy is Good Science. Verygood science..." --James "The Amazing" Randi, President, JamesRandi Educational Foundation, and author of An Encyclopedia ofClaims, Frauds, and Hoaxes of the Occult and Supernatural "Bad Astronomy is a fun read. Plait is wonderfully witty andeducational as he debunks the myths, legends, and 'conspiraciesthat abound in our society. 'The Truth Is Out There' and it's inthis book. I loved it!" --Mike Mullane, Space Shuttle astronaut andauthor of Do Your Ears Pop in Space?

The Two Moons

James P. Hogan
The Two Moons Book PDF

Author : James P. Hogan
Publisher : Baen Publishing Enterprises
Page : 608 pages
File Size : 45,9 Mb
Release : 2006-04-01
Category : Fiction
ISBN : 9781618245236

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The Two Moons by James P. Hogan Pdf

BEGIN THE CELEBRATED "GIANTS" SERIES WITH TWO COMPLETE NOVELS BY A MASTER OF SCIENCE FICTION WITH REAL SCIENCE! Inherit the Stars: When they found the corpse in a grave on the Moon, wearing a spacesuit of unfamiliar design, his identity was a complete mystery. Analysis showed that the deceased was 50,000 years old-meaning that he had somehow died on the Moon before the human race even existed. The Gentle Giants of Ganymede: On another moon, Jupiter's Ganymede, still another mystery: a wrecked spaceship, which had been there for millennia, and was obviously designed for beings larger than the humans of Earth. The mystery seemed insoluble until another ship, manned by the same humanoid giants arrived, and were very surprised to find humans inhabiting their Solar System. . . . At the publisher's request, this title is sold without DRM (Digital Rights Management). "PURE SCIENCE FICTION . . . ARTHUR CLARKE, MOVE OVER." -Isaac Asimov

Two Moons

Krystal A. Smith
Two Moons Book PDF

Author : Krystal A. Smith
Publisher : Unknown
Page : 164 pages
File Size : 43,5 Mb
Release : 2018-03-20
Category : Electronic
ISBN : 0997243902

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Two Moons by Krystal A. Smith Pdf

A splendid debut collection of speculative fiction that traverses the connections between earth and the heavens, the living and the spectral, human and animal. In "Cosmic," a former drug addict has a chance to redeem herself and restore honor to her family's name. In "Harvest," a woman tasked with providing for her community ponders her inability to bear live children. In the title story, "Two Moons," a young woman falls in love with the moon, and is astonished by the moon's response. In "What the Heart Wants," a rejected lover discovers that her physical and emotional desires are incongruent with the organ pumping blood through her veins. Sensitive, ethereal, humorous, and at times, heart-breaking, Smith's collection of speculative fiction signals the arrival of an exceptionally talented writer with a promising career ahead of her.

A Question and Answer Guide to Astronomy

Pierre-Yves Bely,Carol Christian,Jean-René Roy
A Question and Answer Guide to Astronomy Book PDF

Author : Pierre-Yves Bely,Carol Christian,Jean-René Roy
Publisher : Cambridge University Press
Page : 295 pages
File Size : 48,7 Mb
Release : 2010-03-11
Category : Science
ISBN : 9780521180665

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A Question and Answer Guide to Astronomy by Pierre-Yves Bely,Carol Christian,Jean-René Roy Pdf

A practical answer guide to humankind's age-old questions on planets, our universe and everything beyond and between.

Moon! Earth's Best Friend

Stacy McAnulty
Moon Earth s Best Friend Book PDF

Author : Stacy McAnulty
Publisher : Henry Holt and Company (BYR)
Page : 40 pages
File Size : 53,7 Mb
Release : 2019-06-11
Category : Juvenile Nonfiction
ISBN : 9781250267504

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Moon! Earth's Best Friend by Stacy McAnulty Pdf

From writer Stacy McAnulty and illustrator Stevie Lewis, Moon! Earth's Best Friend is a light-hearted nonfiction picture book about the formation and history of the moon—told from the perspective of the moon itself. Meet Moon! She's more than just a rock—she’s Earth’s rock, her best friend she can always count on. Moon never turns her back on her friend (literally: she's always facing Earth with the same side!). These two will stick together forever. With characteristic humor and charm, Stacy McAnulty channels the voice of Moon in this next celestial "autobiography" in the Our Universe series. Rich with kid-friendly facts and beautifully brought to life by Stevie Lewis, this is an equally charming and irresistible companion to Earth! My First 4.54 Billion Years and Sun! One in a Billion.

Walk Two Moons

Sharon Creech
Walk Two Moons Book PDF

Author : Sharon Creech
Publisher : Harper Collins
Page : 292 pages
File Size : 41,5 Mb
Release : 2009-10-06
Category : Juvenile Fiction
ISBN : 9780061972515

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Walk Two Moons by Sharon Creech Pdf

In her own singularly beautiful style, Newbery Medal winner Sharon Creech intricately weaves together two tales, one funny, one bittersweet, to create a heartwarming, compelling, and utterly moving story of love, loss, and the complexity of human emotion. Thirteen-year-old Salamanca Tree Hiddle, proud of her country roots and the "Indian-ness in her blood," travels from Ohio to Idaho with her eccentric grandparents. Along the way, she tells them of the story of Phoebe Winterbottom, who received mysterious messages, who met a "potential lunatic," and whose mother disappeared. As Sal entertains her grandparents with Phoebe's outrageous story, her own story begins to unfold—the story of a thirteen-year-old girl whose only wish is to be reunited with her missing mother.

The Traveler's Guide to Space

Neil F. Comins
The Traveler s Guide to Space Book PDF

Author : Neil F. Comins
Publisher : Columbia University Press
Page : 351 pages
File Size : 54,9 Mb
Release : 2017-02-21
Category : Science
ISBN : 9780231542890

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The Traveler's Guide to Space by Neil F. Comins Pdf

If you have ever wondered about space travel, now you have the opportunity to understand it more fully than ever before. Traveling into space and even emigrating to nearby worlds may soon become part of the human experience. Scientists, engineers, and investors are working hard to make space tourism and colonization a reality. As astronauts can attest, extraterrestrial travel is incomparably thrilling. To make the most of the experience requires serious physical and mental adaptations in virtually every aspect of life, from eating to intimacy. Everyone who goes into space sees Earth and life on it from a profoundly different perspective than they had before liftoff. Astronomer and former NASA/ASEE scientist Neil F. Comins has written the go-to book for anyone interested in space exploration. He describes the wonders that travelers will encounter—weightlessness, unparalleled views of Earth and the cosmos, and the opportunity to walk on another world—as well as the dangers: radiation, projectiles, unbreathable atmospheres, and potential equipment failures. He also provides insights into specific trips to destinations including suborbital flights, space stations, the Moon, asteroids, comets, and Mars—the top candidate for colonization. Although many challenges are technical, Comins outlines them in clear language for all readers. He synthesizes key issues and cutting-edge research in astronomy, physics, biology, psychology, and sociology to create a complete manual for the ultimate voyage.