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Cosmology looks at how to comprehend the universe.
Cosmology, is the study of the universe in its totality. Cosmology by extension, tries to find humanity's place in the universe. Though the word cosmology is recent (first used in 1730 in Christian Wolff's Cosmologia Generalis), study of the universe has a long history involving science, philosophy, esotericism, and religion.
In recent times, physics and Astrophysics have come to play a central role in shaping what is now known as Physical cosmology by bringing observations and mathematical tools to analyze universe as a whole; in other words, in the understanding of the Universe through scientific observation and experiment. This discipline, which focuses on the Universe as it exists on the largest scales and at the earliest times, is generally understood to begin with the Big Bang (possibly combined with inflation)- an expansion of space from which the Universe itself is thought to have emerged ~13.7 ± 0.2 billion (109) years ago. From its violent beginnings and until its various speculative ends, cosmologists then propose that the entire history of the Universe has been governed by physical laws.
In between the domains of religion and science, stands the philosophical perspective of metaphysical cosmology. This ancient field of study seeks to draw intuitive conclusions about the nature of the Universe, man, god and/or their relationships based on the extension of some set of presumed facts borrowed from spiritual experience and/or observation.
Cosmology is often an important aspect of the origin beliefs of religions and mythologies that seek to explain the existence and nature of reality. In some cases, views about the creation (cosmogony) and destruction (Eschatology) of the Universe play a central role in shaping a framework of religious cosmology for understanding humanity's role in the Universe.
A more contemporary distinction between religion and philosophy, Esoteric cosmology is distinguished from religion in its less tradition-bound construction and reliance on modern "intellectual understanding" rather than faith, and from philosophy in its emphasis on spirituality as a formative concept.
Physical cosmology is the branch of physics and astrophysics that deals with the study of the physical origins of the Universe and the nature of the Universe on its very largest scales. In its earliest form it was what is now known as celestial mechanics, the study of the heavens. The Greek philosophers Aristarchus of Samos, Aristotle and Ptolemy proposed different cosmological theories. In particular, the geocentric Ptolemaic system was the accepted theory to explain the motion of the heavens until Nicolaus Copernicus, and subsequently Johannes Kepler and Galileo Galilei proposed a heliocentric system in the 16th century. This is known as one of the most famous examples of epistemological rupture in physical cosmology.
With Isaac Newton and the 1687 publication of Principia Mathematica, the problem of the motion of the heavens was finally solved. Newton provided a physical mechanism for Kepler's laws and his Law of universal gravitation allowed the anomalies in previous systems, caused by gravitational interaction between the planets, to be resolved. A fundamental difference between Newton's cosmology and those preceding it was the Copernican principle that the bodies on earth obey the same physical laws as all the celestial bodies. This was a crucial philosophical advance in physical cosmology.
Modern scientific cosmology is usually considered to have begun in 1917 with Albert Einstein's publication of his final modification of General relativity in the paper "Cosmological Considerations of the General Theory of Relativity," (although this paper was not widely available outside of Germany until the end of World War I). General relativity prompted cosmogonists such as Willem de Sitter, Karl Schwarzschild and Arthur Eddington to explore the astronomical consequences of the theory, which enhanced the growing ability of astronomers to study very distant objects. Prior to this (and for some time afterwards), physicists assumed that the Universe was static and unchanging. Subsequent modeling of the universe explored the possibility that the cosmological constant introduced by Einstein in that paper may result in an expanding universe, depending on its value. Thus the Big Bang theory was proposed by the Belgian priest Georges Lemaître in 1927 which was subsequently corroborated by Edwin Hubble's discovery of the red shift in 1929 and later by the discovery of the cosmic microwave background radiation by Arno Penzias and Robert Woodrow Wilson in 1964.
Recent observations made by the COBE and WMAP satellites observing this background radiation have effectively, in many scientists' eyes, transformed cosmology from a highly speculative science into a predictive science, as these observations matched predictions made by a theory called cosmic inflation, which is a modification of the standard Big Bang theory. This has led many to refer to modern times as the "Golden age of cosmology".
In philosophy and metaphysics, cosmology deals with the world as the totality of space, time and all phenomena. Historically, it has had quite a broad scope, and in many cases was founded in religion. The ancient Greeks did not draw a distinction between this use and their model for the cosmos. However, in modern use it addresses questions about the Universe which are beyond the scope of science. It is distinguished from religious cosmology in that it approaches these questions using philosophical methods (e.g. dialectics). Modern metaphysical cosmology tries to address questions such as:
Many world religions have origin beliefs that explain the beginnings of the Universe and life. Often these are derived from scriptural teachings and held to be part of the faith's dogma, but in some cases these are also extended through the use of philosophical and metaphysical arguments.
In some origin beliefs, the universe was created by a direct act of a god or gods who are also responsible for the creation of humanity (see creationism). In many cases, religious cosmologies also foretell the end of the Universe, either through another divine act or as part of the original design.
Many religions accept the findings of physical cosmology, in particular the Big Bang, and some, such as the Roman Chatholic Church, have embraced it as suggesting a philosophical first cause. Others have tried to use the methodology of science to advocate for their own religious cosmology, as in intelligent design or creationist cosmologies.
Many esoteric and occult teachings involve highly elaborate cosmologies. These constitute a "map" of the Universe and of states of existences and consciousness according to the worldview of that particular doctrine. Such cosmologies cover many of the same concerns also addressed by religious and philosophical cosmology, such as the origin, purpose, and destiny of the Universe and of consciousness and the nature of existence. For this reason it is difficult to distinguish where religion or philosophy end and esotericism and/or occultism begins. Common themes addressed in esoteric cosmology are emanation, involution, evolution, epigenesis, planes of existence, hierarchies of spiritual beings, cosmic cycles (e.g., cosmic year, Yuga), yogic or spiritual disciplines, and references to altered states of consciousness. Examples of esoteric cosmologies can be found in modern Theosophy, Gnosticism, The Urantia Book, Tantra (especially Kashmir Shaivism), Kabbalah, Sufism, Surat Shabda Yoga, Anthroposophy, the Fourth Way teaching of Gurdjieff and Ouspensky and in The Rosicrucian Cosmo-Conception, as well as the book "God Speaks" by Meher Baba.
Links For Cosmology.Official String Theory Web Site - An accessible introduction to cutting edge physics of the next millenium.
The 21st Century's All New Cosmology - Best understanding of Cosmology's Big Bang IN SPACE by eliminating unsupported assumptions & logically assembling all modern observations with proven physics.
The Origin and Its Meaning - On the Origin of the Universe and Its Mechanics, The Mechanism and Origin of Intelligence, and the Implications for the Individual and Society.
Cosmology, a research briefing
Dr. Dark Matter
UCT Cosmology Group
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