An Introduction to Comets

An Introduction to Comets

Author: Nicolas Thomas

Publisher: Springer Nature

Published: 2020-12-15

Total Pages: 537

ISBN-13: 303050574X

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Written by a leading expert on comets, this textbook is divided into seven main elements with a view to allowing advanced students to appreciate the interconnections between the different elements. The author opens with a brief introductory segment on the motivation for studying comets and the overall scope of the book. The first chapter describes fundamental aspects most usually addressed by ground-based observation. The author then looks at the basic physical phenomena in four separate chapters addressing the nucleus, the emitted gas, the emitted dust, and the solar wind interaction. Each chapter introduces the basic physics and chemistry but then new specific measurements by Rosetta instruments at comet Churyumov-Gerasimenko are brought in. A concerted effort has been made to distinguish between established fact and conjecture. Deviations and inconsistencies are brought out and their significance explained. Links to previous observations of comets Tempel 1, Wild 2, Hartley 2, Halley and others are made. The author then closes with three smaller chapters on related objects, the loss of comets, and prospects for future exploration. This textbook includes over 275 graphics and figures – most of which are original. Thorough explanations and derivations are included throughout the chapters. The text is therefore designed to support MSc. students and new PhD students in the field wanting to gain a solid overview of the state-of-the-art.


Comets

Comets

Author: David Levy

Publisher: Simon and Schuster

Published: 2012-12-11

Total Pages: 252

ISBN-13: 1471109585

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David Levy brings these "ghostly apparitions" to life. With fascinating scenarios both real and imagined, he shows how comets have wreaked their special havoc on Earth and other planets. Beginning with ground zero as comets take form, we track the paths their icy, rocky masses take around our universe and investigate the enormous potential that future comets have to directly affect the way we live on this planet and what we might find as we travel to other planets. In this extraordinary volume, David Levy shines his expert light on a subject that has long captivated our imaginations and fears, and demonstrates the need for our continued and rapt attention.


Introduction to Astrobiology

Introduction to Astrobiology

Author: C. Sivaram

Publisher: Universities Press

Published: 2004-03

Total Pages: 164

ISBN-13: 9788173714702

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Astrobiology Is The Science That Seeks To Unravel The Mysteries Of The Origin Of Life And The Conditions That Would Support The Birth And Evolution Of Life Forms. It Involves Several Disciplines Of Science Which Are Essential For Understanding The Several Biological Mechanisms Which Can Culminate In Life. This Book Attempts A Broad Definition Of Astrobiology, Life And The Conditions For The Existence Of Life.The Book Addresses A Whole Lot Of Interesting Issues That Have Puzzled Man From Time Immemorial Is There Life Elsewhere In The Universe? Can We Communicate With Extraterrestrial Beings? What Are The Dangers Of Interstellar Flight?


A History of Physical Theories of Comets, From Aristotle to Whipple

A History of Physical Theories of Comets, From Aristotle to Whipple

Author: Tofigh Heidarzadeh

Publisher: Springer Science & Business Media

Published: 2008-05-23

Total Pages: 283

ISBN-13: 1402083238

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Although the development of ideas about the motion and trajectory of comets has been investigated piecemeal, we lack a comprehensive and detailed survey of ph- ical theories of comets. The available works either illustrate relatively short periods in the history of physical cometology or portray a landscape view without adequate details. The present study is an attempt to review – with more details – the major physical theories of comets in the past two millennia, from Aristotle to Whipple. My research, however, did not begin with antiquity. The basic question from which this project originated was a simple inquiry about the cosmic identity of comets at the dawn of the astronomical revolution: how did natural philosophers and astronomers define the nature and place of a new category of celestial objects – comets – after Brahe’s estimation of cometary distances? It was from this turning point in the history of cometary theories that I expanded my studies in both the pre-modern and modern eras. A study starting merely from Brahe and ending with Newton, without covering classical and medieval thought about comets, would be incomplete and leave the fascinating achievements of post-Newtonian cometology unexplored.


The Greatest Comets in History

The Greatest Comets in History

Author: David A.J. Seargent

Publisher: Springer Science & Business Media

Published: 2008-12-16

Total Pages: 272

ISBN-13: 0387095136

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Naked-eye comets are far from uncommon. As a rough average, one appears every 18 months or thereabouts, and it is not very unusual to see more than two in a single year. The record so far seems to have been 2004, with a total of five comets visible without optical aid. But 2006, 1970, and 1911 were not far behind with a total of four apiece. Yet, the majority of these pass unnoticed by the general public. Most simply look like fuzzy stars with tails that are either faint or below the naked-eye threshold. The ‘classical’ comet – a bright star-like object with a long flowing tail – is a sight that graces our skies about once per decade, on average. These ‘great comets’ are surely among the most beautiful objects that we can see in the heavens, and it is no wonder that they created such fear in earlier times. Just what makes a comet ‘‘great’’ is not easy to define. It is neither just about brightness nor only a matter of size. Some comets can sport prodigiously long tails and yet not be regarded as great. Others can become very bright, but hardly anyone other than a handful of enthusiastic astronomers will ever see them. Much depends on their separation from the Sun, the intensity of the tail, and so forth.