Author: Victor Christianto
Publisher: Infinite Study
ISBN:
Category : Mathematics
Languages : en
Pages : 191
Book Description
This book is inspired by a German theoretical physicist, Sabine Hossenfelder’s publication: “Lost in Mathematics”. Her book seems to question highly mathematical and a lot of abstraction in the development of physics and cosmology studies nowadays. There is clear tendency that in recent decades, the physics science has been predominated by such an advanced mathematics, which at times sounding more like acrobatics approach to a reality. Through books by senior mathematical-physicists like Unzicker and Peter Woit, we know that the answer of TOE is not in superstring theories or other variations of such 26 dimensional bosonic string theory, of which none of those theories survived experimental test, but perhaps in low dimensional physics. As Alexander Unzicker suggests, perhaps it is more advisable to consider rotation in 3D space (known as SO3), or a kind of superfluid vortices version of gravitation theory. We can also reconsider proposition by the late Prof F. Winterberg (formerly professor at Univ. Nevada, Reno), that it is most likely that superfluid phonon roton theory in 3D can replace the entire superstring theories. While we don’t explore yet implications of his model to particle physics, we discuss here some published papers at several journals in the past few years.
Lost and Found in Mathematics. Dissident cosmologists’s guide to the Universe
Author: Victor Christianto
Publisher: Infinite Study
ISBN:
Category : Mathematics
Languages : en
Pages : 191
Book Description
This book is inspired by a German theoretical physicist, Sabine Hossenfelder’s publication: “Lost in Mathematics”. Her book seems to question highly mathematical and a lot of abstraction in the development of physics and cosmology studies nowadays. There is clear tendency that in recent decades, the physics science has been predominated by such an advanced mathematics, which at times sounding more like acrobatics approach to a reality. Through books by senior mathematical-physicists like Unzicker and Peter Woit, we know that the answer of TOE is not in superstring theories or other variations of such 26 dimensional bosonic string theory, of which none of those theories survived experimental test, but perhaps in low dimensional physics. As Alexander Unzicker suggests, perhaps it is more advisable to consider rotation in 3D space (known as SO3), or a kind of superfluid vortices version of gravitation theory. We can also reconsider proposition by the late Prof F. Winterberg (formerly professor at Univ. Nevada, Reno), that it is most likely that superfluid phonon roton theory in 3D can replace the entire superstring theories. While we don’t explore yet implications of his model to particle physics, we discuss here some published papers at several journals in the past few years.
Publisher: Infinite Study
ISBN:
Category : Mathematics
Languages : en
Pages : 191
Book Description
This book is inspired by a German theoretical physicist, Sabine Hossenfelder’s publication: “Lost in Mathematics”. Her book seems to question highly mathematical and a lot of abstraction in the development of physics and cosmology studies nowadays. There is clear tendency that in recent decades, the physics science has been predominated by such an advanced mathematics, which at times sounding more like acrobatics approach to a reality. Through books by senior mathematical-physicists like Unzicker and Peter Woit, we know that the answer of TOE is not in superstring theories or other variations of such 26 dimensional bosonic string theory, of which none of those theories survived experimental test, but perhaps in low dimensional physics. As Alexander Unzicker suggests, perhaps it is more advisable to consider rotation in 3D space (known as SO3), or a kind of superfluid vortices version of gravitation theory. We can also reconsider proposition by the late Prof F. Winterberg (formerly professor at Univ. Nevada, Reno), that it is most likely that superfluid phonon roton theory in 3D can replace the entire superstring theories. While we don’t explore yet implications of his model to particle physics, we discuss here some published papers at several journals in the past few years.
Chemical Cosmology
Author: Jan C. A. Boeyens
Publisher: Springer Science & Business Media
ISBN: 9048138280
Category : Science
Languages : en
Pages : 432
Book Description
The composition of the most remote objects brought into view by the Hubble telescope can no longer be reconciled with the nucleogenesis of standard cosmology and the alternative explanation, in terms of the Λ-Cold-Dark-Matter model, has no recognizable chemical basis. A more rational scheme, based on the chemistry and periodicity of atomic matter, opens up an exciting new interpretation of the cosmos in terms of projective geometry and general relativity. The response of atomic structure to environmental pressure predicts non-Doppler cosmical redshifts and equilibrium nucleogenesis by α-particle addition, in accord with observed periodic variation of nuclear abundance. Inferred cosmic self similarity elucidates the Bode –Titius law, general commensurability in the solar system and the occurrence of quantum phenomena on a cosmic scale. The generalized periodic function involves both matter and anti-matter in an involuted mapping to a closed projective plane. This topology ensures the same symmetrical balance in a chiral universe, wrapped around an achiral vacuum interface, without singularities. A new cosmology emerges, based on the theory of projective relativity, presented here as a translation of Veblen’s original German text. Not only does it provide a unification of gravity, electromagnetism and quantum theory, through gauge invariance, but also supports the solution of the gravitational field equations, obtained by Gödel for a rotating universe. The appearance of an Einstein–Rosen bridge as outlet from a black hole, into conjugate anti-space, accounts for globular clusters, quasars, cosmic radiation, γ-ray bursters, pulsars, radio sources and other regions of plasma activity. The effects of a multiply-connected space-time manifold on observations in an Euclidean tangent space are unpredictable and a complete re-assessment of the size and structure of the universe is indicated. The target readership includes scientists, as well as non-scientists – everybody with a scientific or philosophical interest in cosmology and, especially those cosmologists and mathematicians with the ability to recast the crude ideas presented here into appropriate mathematical models.
Publisher: Springer Science & Business Media
ISBN: 9048138280
Category : Science
Languages : en
Pages : 432
Book Description
The composition of the most remote objects brought into view by the Hubble telescope can no longer be reconciled with the nucleogenesis of standard cosmology and the alternative explanation, in terms of the Λ-Cold-Dark-Matter model, has no recognizable chemical basis. A more rational scheme, based on the chemistry and periodicity of atomic matter, opens up an exciting new interpretation of the cosmos in terms of projective geometry and general relativity. The response of atomic structure to environmental pressure predicts non-Doppler cosmical redshifts and equilibrium nucleogenesis by α-particle addition, in accord with observed periodic variation of nuclear abundance. Inferred cosmic self similarity elucidates the Bode –Titius law, general commensurability in the solar system and the occurrence of quantum phenomena on a cosmic scale. The generalized periodic function involves both matter and anti-matter in an involuted mapping to a closed projective plane. This topology ensures the same symmetrical balance in a chiral universe, wrapped around an achiral vacuum interface, without singularities. A new cosmology emerges, based on the theory of projective relativity, presented here as a translation of Veblen’s original German text. Not only does it provide a unification of gravity, electromagnetism and quantum theory, through gauge invariance, but also supports the solution of the gravitational field equations, obtained by Gödel for a rotating universe. The appearance of an Einstein–Rosen bridge as outlet from a black hole, into conjugate anti-space, accounts for globular clusters, quasars, cosmic radiation, γ-ray bursters, pulsars, radio sources and other regions of plasma activity. The effects of a multiply-connected space-time manifold on observations in an Euclidean tangent space are unpredictable and a complete re-assessment of the size and structure of the universe is indicated. The target readership includes scientists, as well as non-scientists – everybody with a scientific or philosophical interest in cosmology and, especially those cosmologists and mathematicians with the ability to recast the crude ideas presented here into appropriate mathematical models.
The Cognitive-Theoretic Model of the Universe: A New Kind of Reality Theory
Author: Christopher Michael Langan
Publisher: Mega Foundation Press
ISBN: 0971916225
Category : Philosophy
Languages : en
Pages : 94
Book Description
Paperback version of the 2002 paper published in the journal Progress in Information, Complexity, and Design (PCID). ABSTRACT Inasmuch as science is observational or perceptual in nature, the goal of providing a scientific model and mechanism for the evolution of complex systems ultimately requires a supporting theory of reality of which perception itself is the model (or theory-to-universe mapping). Where information is the abstract currency of perception, such a theory must incorporate the theory of information while extending the information concept to incorporate reflexive self-processing in order to achieve an intrinsic (self-contained) description of reality. This extension is associated with a limiting formulation of model theory identifying mental and physical reality, resulting in a reflexively self-generating, self-modeling theory of reality identical to its universe on the syntactic level. By the nature of its derivation, this theory, the Cognitive Theoretic Model of the Universe or CTMU, can be regarded as a supertautological reality-theoretic extension of logic. Uniting the theory of reality with an advanced form of computational language theory, the CTMU describes reality as a Self Configuring Self-Processing Language or SCSPL, a reflexive intrinsic language characterized not only by self-reference and recursive self-definition, but full self-configuration and self-execution (reflexive read-write functionality). SCSPL reality embodies a dual-aspect monism consisting of infocognition, self-transducing information residing in self-recognizing SCSPL elements called syntactic operators. The CTMU identifies itself with the structure of these operators and thus with the distributive syntax of its self-modeling SCSPL universe, including the reflexive grammar by which the universe refines itself from unbound telesis or UBT, a primordial realm of infocognitive potential free of informational constraint. Under the guidance of a limiting (intrinsic) form of anthropic principle called the Telic Principle, SCSPL evolves by telic recursion, jointly configuring syntax and state while maximizing a generalized self-selection parameter and adjusting on the fly to freely-changing internal conditions. SCSPL relates space, time and object by means of conspansive duality and conspansion, an SCSPL-grammatical process featuring an alternation between dual phases of existence associated with design and actualization and related to the familiar wave-particle duality of quantum mechanics. By distributing the design phase of reality over the actualization phase, conspansive spacetime also provides a distributed mechanism for Intelligent Design, adjoining to the restrictive principle of natural selection a basic means of generating information and complexity. Addressing physical evolution on not only the biological but cosmic level, the CTMU addresses the most evident deficiencies and paradoxes associated with conventional discrete and continuum models of reality, including temporal directionality and accelerating cosmic expansion, while preserving virtually all of the major benefits of current scientific and mathematical paradigms.
Publisher: Mega Foundation Press
ISBN: 0971916225
Category : Philosophy
Languages : en
Pages : 94
Book Description
Paperback version of the 2002 paper published in the journal Progress in Information, Complexity, and Design (PCID). ABSTRACT Inasmuch as science is observational or perceptual in nature, the goal of providing a scientific model and mechanism for the evolution of complex systems ultimately requires a supporting theory of reality of which perception itself is the model (or theory-to-universe mapping). Where information is the abstract currency of perception, such a theory must incorporate the theory of information while extending the information concept to incorporate reflexive self-processing in order to achieve an intrinsic (self-contained) description of reality. This extension is associated with a limiting formulation of model theory identifying mental and physical reality, resulting in a reflexively self-generating, self-modeling theory of reality identical to its universe on the syntactic level. By the nature of its derivation, this theory, the Cognitive Theoretic Model of the Universe or CTMU, can be regarded as a supertautological reality-theoretic extension of logic. Uniting the theory of reality with an advanced form of computational language theory, the CTMU describes reality as a Self Configuring Self-Processing Language or SCSPL, a reflexive intrinsic language characterized not only by self-reference and recursive self-definition, but full self-configuration and self-execution (reflexive read-write functionality). SCSPL reality embodies a dual-aspect monism consisting of infocognition, self-transducing information residing in self-recognizing SCSPL elements called syntactic operators. The CTMU identifies itself with the structure of these operators and thus with the distributive syntax of its self-modeling SCSPL universe, including the reflexive grammar by which the universe refines itself from unbound telesis or UBT, a primordial realm of infocognitive potential free of informational constraint. Under the guidance of a limiting (intrinsic) form of anthropic principle called the Telic Principle, SCSPL evolves by telic recursion, jointly configuring syntax and state while maximizing a generalized self-selection parameter and adjusting on the fly to freely-changing internal conditions. SCSPL relates space, time and object by means of conspansive duality and conspansion, an SCSPL-grammatical process featuring an alternation between dual phases of existence associated with design and actualization and related to the familiar wave-particle duality of quantum mechanics. By distributing the design phase of reality over the actualization phase, conspansive spacetime also provides a distributed mechanism for Intelligent Design, adjoining to the restrictive principle of natural selection a basic means of generating information and complexity. Addressing physical evolution on not only the biological but cosmic level, the CTMU addresses the most evident deficiencies and paradoxes associated with conventional discrete and continuum models of reality, including temporal directionality and accelerating cosmic expansion, while preserving virtually all of the major benefits of current scientific and mathematical paradigms.
Elementary Cosmology
Author: James J Kolata
Publisher: Morgan & Claypool Publishers
ISBN: 1681741644
Category : Nature
Languages : en
Pages : 155
Book Description
Cosmology is the study of the origin, size, and evolution of the entire universe. Every culture has developed a cosmology, whether it be based on religious, philosophical, or scientific principles. In this book, the evolution of the scientific understanding of the Universe in Western tradition is traced from the early Greek philosophers to the most modern 21st century view. After a brief introduction to the concept of the scientific method, the first part of the book describes the way in which detailed observations of the Universe, first with the naked eye and later with increasingly complex modern instruments, ultimately led to the development of the "Big Bang" theory. The second part of the book traces the evolution of the Big Bang including the very recent observation that the expansion of the Universe is itself accelerating with time.
Publisher: Morgan & Claypool Publishers
ISBN: 1681741644
Category : Nature
Languages : en
Pages : 155
Book Description
Cosmology is the study of the origin, size, and evolution of the entire universe. Every culture has developed a cosmology, whether it be based on religious, philosophical, or scientific principles. In this book, the evolution of the scientific understanding of the Universe in Western tradition is traced from the early Greek philosophers to the most modern 21st century view. After a brief introduction to the concept of the scientific method, the first part of the book describes the way in which detailed observations of the Universe, first with the naked eye and later with increasingly complex modern instruments, ultimately led to the development of the "Big Bang" theory. The second part of the book traces the evolution of the Big Bang including the very recent observation that the expansion of the Universe is itself accelerating with time.
The Death of Man as Man
Author: Ronnie W. Rogers
Publisher: WestBow Press
ISBN: 1512743720
Category : Religion
Languages : en
Pages : 222
Book Description
The content of this book was first presented in its present form at The Oxford Round Table, Religion and Science Shaping the Modern World, in 2010 at Harris Manchester College, Oxford University, Oxford England. Science, or its handmaiden separation of church and state, is absolutely incapable of establishing or sustaining the liberties spelled out in the Declaration of Independence and protected by the Constitution. The United States was founded upon the astonishing declaration, We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable rights, that among these are life, liberty and the pursuit of happiness. That to secure these rights, governments are instituted among men, deriving their just powers from the consent of the governed. Then the Constitution was drafted in order to secure the Blessings of Liberty to ourselves and our Posterity. It is these rights and liberties that are being systematically and surreptitiously dismantled by both the unwarranted expansion of science beyond its legitimate domain and the restricting of religious ideas from public education and policy debate. True science has blessed us, but when employed beyond its legitimate limits of authority, it becomes a dehumanizing tyrant. Science has its place in public life, but to limit religious knowledge to merely opinion and private faith, while concurrently limiting all publicly imposable knowledge to what can be demonstrated scientifically, requires more than science can provide. These liberties are based upon belief in the existence of God who created man with intrinsic worth and liberties. Without a public belief in the existence of God, all talk of unalienable rights is quixotic and assures the continuation of the heretofore unabated evanescing of those rights.
Publisher: WestBow Press
ISBN: 1512743720
Category : Religion
Languages : en
Pages : 222
Book Description
The content of this book was first presented in its present form at The Oxford Round Table, Religion and Science Shaping the Modern World, in 2010 at Harris Manchester College, Oxford University, Oxford England. Science, or its handmaiden separation of church and state, is absolutely incapable of establishing or sustaining the liberties spelled out in the Declaration of Independence and protected by the Constitution. The United States was founded upon the astonishing declaration, We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable rights, that among these are life, liberty and the pursuit of happiness. That to secure these rights, governments are instituted among men, deriving their just powers from the consent of the governed. Then the Constitution was drafted in order to secure the Blessings of Liberty to ourselves and our Posterity. It is these rights and liberties that are being systematically and surreptitiously dismantled by both the unwarranted expansion of science beyond its legitimate domain and the restricting of religious ideas from public education and policy debate. True science has blessed us, but when employed beyond its legitimate limits of authority, it becomes a dehumanizing tyrant. Science has its place in public life, but to limit religious knowledge to merely opinion and private faith, while concurrently limiting all publicly imposable knowledge to what can be demonstrated scientifically, requires more than science can provide. These liberties are based upon belief in the existence of God who created man with intrinsic worth and liberties. Without a public belief in the existence of God, all talk of unalienable rights is quixotic and assures the continuation of the heretofore unabated evanescing of those rights.
Fred Hoyle's Universe
Author: Jane Gregory
Publisher: Oxford University Press, USA
ISBN: 0198507917
Category : Biography & Autobiography
Languages : en
Pages : 417
Book Description
Fred Hoyle was one of the most widely acclaimed and colourful scientists of the twentieth century, a down-to-earth Yorkshireman who combined a brilliant scientific mind with a relish for communication and controversy.Best known for his steady-state theory of cosmology, he described a universe with both an infinite past and an infinite future. He coined the phrase 'big bang' to describe the main competing theory, and sustained a long-running, sometimes ill-tempered, and typically public debate with his scientific rivals. He showed how the elements are formed by nuclear reactions inside stars, and explained how we are therefore all formed from stardust. He also claimed that diseases fall from the sky,attacked Darwinism, and branded the famous fossil of the feathered Archaeopteryx a fake.Throughout his career, Hoyle played a major role in the popularization of science. Through his radio broadcasts and his highly successful science fiction novels he became a household name, though his outspokenness and support for increasingly outlandish causes later in life at times antagonized the scientific community.Jane Gregory builds up a vivid picture of Hoyle's role in the ideas, the organization, and the popularization of astronomy in post-war Britain, and provides a fascinating examination of the relationship between a maverick scientist, the scientific establishment, and the public. Through the life of Hoyle, this book chronicles the triumphs, jealousies, rewards, and feuds of a rapidly developing scientific field, in a narrative animated by a cast of colourful astronomers, keeping secrets, losingtheir tempers, and building their careers here on Earth while contemplating the nature of the stars.
Publisher: Oxford University Press, USA
ISBN: 0198507917
Category : Biography & Autobiography
Languages : en
Pages : 417
Book Description
Fred Hoyle was one of the most widely acclaimed and colourful scientists of the twentieth century, a down-to-earth Yorkshireman who combined a brilliant scientific mind with a relish for communication and controversy.Best known for his steady-state theory of cosmology, he described a universe with both an infinite past and an infinite future. He coined the phrase 'big bang' to describe the main competing theory, and sustained a long-running, sometimes ill-tempered, and typically public debate with his scientific rivals. He showed how the elements are formed by nuclear reactions inside stars, and explained how we are therefore all formed from stardust. He also claimed that diseases fall from the sky,attacked Darwinism, and branded the famous fossil of the feathered Archaeopteryx a fake.Throughout his career, Hoyle played a major role in the popularization of science. Through his radio broadcasts and his highly successful science fiction novels he became a household name, though his outspokenness and support for increasingly outlandish causes later in life at times antagonized the scientific community.Jane Gregory builds up a vivid picture of Hoyle's role in the ideas, the organization, and the popularization of astronomy in post-war Britain, and provides a fascinating examination of the relationship between a maverick scientist, the scientific establishment, and the public. Through the life of Hoyle, this book chronicles the triumphs, jealousies, rewards, and feuds of a rapidly developing scientific field, in a narrative animated by a cast of colourful astronomers, keeping secrets, losingtheir tempers, and building their careers here on Earth while contemplating the nature of the stars.
Understanding the Universe
Author: Don Lincoln
Publisher: World Scientific
ISBN: 9814374466
Category : Science
Languages : en
Pages : 594
Book Description
This book explains the fascinating world of quarks and leptons and the forces that govern their behavior. Told from an experimental physicist's perspective, it forgoes mathematical complexity, using instead particularly accessible figures and apt analogies. In addition to the story of quarks and leptons, which are regarded as well-accepted fact, the author (who is a leading researcher at one of the world's highest energy particle physics laboratories) also discusses mysteries at both the experimental and theoretical frontiers, before tying it all together with the exciting field of cosmology and indeed the birth of the universe itself.
Publisher: World Scientific
ISBN: 9814374466
Category : Science
Languages : en
Pages : 594
Book Description
This book explains the fascinating world of quarks and leptons and the forces that govern their behavior. Told from an experimental physicist's perspective, it forgoes mathematical complexity, using instead particularly accessible figures and apt analogies. In addition to the story of quarks and leptons, which are regarded as well-accepted fact, the author (who is a leading researcher at one of the world's highest energy particle physics laboratories) also discusses mysteries at both the experimental and theoretical frontiers, before tying it all together with the exciting field of cosmology and indeed the birth of the universe itself.
Newton and the Counterfeiter
Author: Thomas Levenson
Publisher: Faber & Faber
ISBN: 0571265758
Category : History
Languages : en
Pages : 338
Book Description
Already famous throughout Europe for his theories of planetary motion and gravity, Isaac Newton decided to take on the job of running the Royal Mint. And there, Newton became drawn into a battle with William Chaloner, the most skilful of counterfeiters, a man who not only got away with faking His Majesty's coins (a crime that the law equated with treason), but was trying to take over the Mint itself. But Chaloner had no idea who he was taking on. Newton pursued his enemy with the cold, implacable logic that he brought to his scientific research. Set against the backdrop of early eighteenth-century London with its sewers running down the middle of the streets, its fetid rivers, its packed houses, smoke and fog, its industries and its great port, this dark tale of obsession and revenge transforms our image of Britain's greatest scientist.
Publisher: Faber & Faber
ISBN: 0571265758
Category : History
Languages : en
Pages : 338
Book Description
Already famous throughout Europe for his theories of planetary motion and gravity, Isaac Newton decided to take on the job of running the Royal Mint. And there, Newton became drawn into a battle with William Chaloner, the most skilful of counterfeiters, a man who not only got away with faking His Majesty's coins (a crime that the law equated with treason), but was trying to take over the Mint itself. But Chaloner had no idea who he was taking on. Newton pursued his enemy with the cold, implacable logic that he brought to his scientific research. Set against the backdrop of early eighteenth-century London with its sewers running down the middle of the streets, its fetid rivers, its packed houses, smoke and fog, its industries and its great port, this dark tale of obsession and revenge transforms our image of Britain's greatest scientist.
Cosmic Society
Author: Peter Dickens
Publisher: Routledge
ISBN: 113418980X
Category : Social Science
Languages : en
Pages : 271
Book Description
Space weaponry, satellite surveillance and communications, and private space travel are all means in which outer space is being humanized: incorporated into society’s projects. But what are the political implications of society not only being globalized, but becoming ‘cosmic’? Our ideas about society have long affected, and been affected by, our understanding of the universe: large sections of our economy and society are now organized around humanity’s use of outer space. Our view of the universe, our increasingly ‘cosmic’ society, and even human consciousness are being transformed by new relations with the cosmos. As the first sociological book to tackle humanity’s relationship with the universe, this fascinating volume links social theory to classical and contemporary science, and proposes a new ‘cosmic’ social theory. Written in a punchy, student-friendly style, this timely book engages with a range of topical issues, including cyberspace, terrorism, tourism, surveillance and globalization.
Publisher: Routledge
ISBN: 113418980X
Category : Social Science
Languages : en
Pages : 271
Book Description
Space weaponry, satellite surveillance and communications, and private space travel are all means in which outer space is being humanized: incorporated into society’s projects. But what are the political implications of society not only being globalized, but becoming ‘cosmic’? Our ideas about society have long affected, and been affected by, our understanding of the universe: large sections of our economy and society are now organized around humanity’s use of outer space. Our view of the universe, our increasingly ‘cosmic’ society, and even human consciousness are being transformed by new relations with the cosmos. As the first sociological book to tackle humanity’s relationship with the universe, this fascinating volume links social theory to classical and contemporary science, and proposes a new ‘cosmic’ social theory. Written in a punchy, student-friendly style, this timely book engages with a range of topical issues, including cyberspace, terrorism, tourism, surveillance and globalization.
Cosmic Horizons
Author: Steven Soter
Publisher:
ISBN: 9781565846029
Category : Science
Languages : en
Pages : 253
Book Description
Leading scientists offer a collection of essays that furnish illuminating explanations of recent discoveries in modern astrophysics--from the Big Bang to black holes--the possibility of life on other worlds, and the emerging technologies that make such research possible, accompanied by incisive profiles of such key figures as Carl Sagan and Georges Lemaetre. Original.
Publisher:
ISBN: 9781565846029
Category : Science
Languages : en
Pages : 253
Book Description
Leading scientists offer a collection of essays that furnish illuminating explanations of recent discoveries in modern astrophysics--from the Big Bang to black holes--the possibility of life on other worlds, and the emerging technologies that make such research possible, accompanied by incisive profiles of such key figures as Carl Sagan and Georges Lemaetre. Original.