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Author: Dennis B. Fradin
Publisher: Children's Press(CT)
Published: 1984
Total Pages: 52
ISBN-13: 9780516017235
DOWNLOAD EBOOKDescribes in simple terms the meteors, comets, and asteroids that are part of our solar system and discusses the various theories concerning their origin and their effect on life on Earth.
Author: Ron Miller
Publisher: Twenty-First Century Books
Published: 2011-01-01
Total Pages: 84
ISBN-13: 0761372792
DOWNLOAD EBOOKFrom earliest times, humans have wondered about the sky above them and have studied all visible objects. People began to identify differences between stars and planets, and as technology advanced with telescopes and space probes, they sought deeper understanding of the millions of bits of debris rocketing through the solar system. Scientists determined that most of these objects are left over from the creation of the planets and their moons. They classified these leftovers into categories such as asteroids, comets, and meteors. In this book, we'll explore seven wonders of asteroids, comets, and meteors. Ceres is a huge mountain-sized asteroid that orbits with other asteroids between Mars and Jupiter. Other marvels include Ganymede, the largest asteroid in the group called Earthgrazers or Near-Earth Objects, and Halley's comet, a ball of ice, that passes Earth every seventy-five or so years. We'll also explore the amazing impact that space debris can have on planets and moons. The Borealis Basin, a wondrous crater more than 5,000 miles across, formed when an asteroid collided with Mars in the ancient past. Then we will travel to the far-off Kuiper belt, where as many as 200 million icy bodies orbit, and wonder at the mystery of planetlike objects, such as Pluto and Charon. Finally, we’ll can experience a space wonder firsthand by standing outside on a night in August to watch the spectacular Perseid meteor shower fill the sky.
Author: Tom Gehrels
Publisher: University of Arizona Press
Published: 1994
Total Pages: 1340
ISBN-13: 9780816515059
DOWNLOAD EBOOKIn 1993, the U.S. Department of Defense declassified information dealing with frequent explosions in the upper atmosphere caused by meteoric impact. It is estimated that impacts have occurred of a magnitude equivalent to the atomic bomb detonated at Hiroshima. Not all such space voyagers meet their end in the atmosphere, however; huge craters attest to the bombardment of earth over millions of years, and a major impact may have resulted in the extinction of dinosaurs. An impact in Siberia near the beginning of this century proves that such events are not confined to geologic time. Hazards Due to Comets and Asteroids marks a significant step in the attempt to come to grips with the threats posed by such phenomena. It brings together more than one hundred scientists from around the world, who draw on observational and theoretical research to focus on the technical problems related to all aspects of dealing with these hazards: searching for and identifying hazardous comets and asteroids; describing their statistics and characteristics; intercepting and altering the orbits of dangerous objects; and applying existent technologies—rocket boosters, rendezvous and soft-landing techniques, instrumentation—to such missions. The book considers defensive options for diverting or disrupting an approaching body, including solar sails, kinetic-energy impacts, nuclear explosives, robotic mass drivers, and various propulsion systems. A cataclysmic impact posing a threat to life on Earth is a possibility that tomorrow's technology is capable of averting. This book examines in depth the reality of the threat and proposes practical measures that can be initiated now should we ever need to deal with it.
Author: Seymour Simon
Publisher: Paw Prints
Published: 2009-06
Total Pages: 0
ISBN-13: 9781442057449
DOWNLOAD EBOOKExplores how comets, meteors, and asteroids move through our solar system, and explains the ingredients that make a comet's tail and other topics
Author: Mary-Jane Knight
Publisher: Fast Track: Our Solar System
Published: 2017
Total Pages: 0
ISBN-13: 9781781213681
DOWNLOAD EBOOK"Asteroids, comets, and other space rocks rush around the solar system. Learn about these fascinating flying masses and their place in the solar system."
Author: Arielle Chiger
Publisher: Gareth Stevens Publishing LLLP
Published: 2014-08-01
Total Pages: 34
ISBN-13: 1482407922
DOWNLOAD EBOOKMost asteroids come from a “belt” that orbits the sun between the orbits of Mars and Jupiter. Comets are born in the frozen reaches beyond Neptune. Both are remnants leftover from the birth of our solar system billions of years ago. Readers will be amazed to learn all about these fascinating space rocks. The scientific text is paired with stunning photographs and illustrations of cosmic forces at work. A detailed graphic organizer provides a convenient study guide for comparing and contrasting comets and asteroids.
Author: Rosalind Mist
Publisher: QED Publishing
Published: 2008
Total Pages: 0
ISBN-13: 9781845389666
DOWNLOAD EBOOK"An introduction to asteroids, comets, and meteors, including what they are made of, where they are, and how they interact with other bodies of the solar system"--Provided by publisher.
Author: Natalie Starkey
Publisher: Bloomsbury Publishing
Published: 2018-03-08
Total Pages: 265
ISBN-13: 1472944038
DOWNLOAD EBOOK'Astonishing' - New Scientist Icy, rocky, sometimes dusty, always mysterious – comets and asteroids are among the Solar System's very oldest inhabitants, formed within a swirling cloud of gas and dust in the area of space that eventually hosted the Sun and its planets. Locked within each of these extra-terrestrial objects is the 4.6-billion-year wisdom of Solar System events, and by studying them at close quarters using spacecraft we can coerce them into revealing their closely-guarded secrets. This offers us the chance to answer some fundamental questions about our planet and its inhabitants. Exploring comets and asteroids also allows us to shape the story of Earth's future, enabling us to protect our precious planet from the threat of a catastrophic impact from space, and maybe to even recover valuable raw materials from them. This cosmic bounty could be as useful in space as it is on Earth, providing the necessary fuel and supplies for humans as they voyage into deep space to explore more distant locations within the Solar System. Catching Stardust tells the story of these enigmatic celestial objects, revealing how scientists are using them to help understand a crucial time in our history – the birth of the Solar System, and everything contained within it.
Author: M. J. S. Belton
Publisher: Cambridge University Press
Published: 2004-09-06
Total Pages: 448
ISBN-13: 9780521827645
DOWNLOAD EBOOKIt is known that large asteroids and comets can collide with the Earth with severe consequences. Although the chances of a collision in a person's lifetime are small, collisions are a random process and could occur at any time. This book collects the latest thoughts and ideas of scientists concerned with mitigating the threat of hazardous asteroids and comets. It reviews current knowledge of the population of potential colliders, including their numbers, locations, orbits, and how warning times might be improved. The structural properties and composition of their interiors and surfaces are reviewed, and their orbital response to the application of pulses of energy is discussed. Difficulties of operating in space near, or on the surface of, very low mass objects are examined. The book concludes with a discussion of the problems faced in communicating the nature of the impact hazard to the public.
Author: Steven N. Koppes
Publisher: Twenty-First Century Books
Published: 2004-01-01
Total Pages: 124
ISBN-13: 9780822528616
DOWNLOAD EBOOKDescribes the role that collisions with meteors, comets, and asteroids have played in the history of Earth and other planets in the solar system and examines what is being done to protect Earth from future collisions.
