evolution of cosmologies

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Evolution of Evolution of Cosmologies Cosmologies From Mythic to From Mythic to Mathematical Mathematical

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Evolution of Cosmologies. From Mythic to Mathematical. Natural Cycles begat Explanations. Over time, people would notice patterns and cycles in the sky. The cycles of sunrise and sunset, lunar phases, seasonal motions of the stars, - PowerPoint PPT Presentation

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Page 1: Evolution of Cosmologies

Evolution of CosmologiesEvolution of Cosmologies

From Mythic to MathematicalFrom Mythic to Mathematical

Page 2: Evolution of Cosmologies

Natural Cycles begat Natural Cycles begat ExplanationsExplanations

Over time, people would notice patterns and Over time, people would notice patterns and cycles in the sky.cycles in the sky.– The cycles of sunrise and sunset, The cycles of sunrise and sunset, – lunar phases, lunar phases, – seasonal motions of the stars, seasonal motions of the stars,

These cycles were likely known by everyone (in These cycles were likely known by everyone (in contrast to today!) contrast to today!)

Different cultures had different explanations for Different cultures had different explanations for these observed motions. With a growing these observed motions. With a growing awareness of self and a need to feel connected to awareness of self and a need to feel connected to the cosmos, individual cultures began to project the cosmos, individual cultures began to project their personality onto the celestial canopy. their personality onto the celestial canopy. Certain patterns of stars took on special Certain patterns of stars took on special importance as they were endowed with human or importance as they were endowed with human or animal characteristics. animal characteristics.

Page 3: Evolution of Cosmologies

Natural Cycles and Seasonal Natural Cycles and Seasonal WeatherWeather

Over time, a statistical association Over time, a statistical association between weather and the positions between weather and the positions of stars became apparent.of stars became apparent.

This leads to building very large scale This leads to building very large scale calendars (Pyramids, Stonehenge, calendars (Pyramids, Stonehenge, etc) as a means of known when etc) as a means of known when seasonal change is coming (flooding, seasonal change is coming (flooding, time to plant crops, etc) time to plant crops, etc)

Page 4: Evolution of Cosmologies

Components of The Mythic UniverseComponents of The Mythic Universe

Demons Demons represent our innate fears (of represent our innate fears (of the unknown?)the unknown?)

Gods Gods a source of comfort and exist to a source of comfort and exist to combat Demonscombat Demons

Male/Female polarization Male/Female polarization evil demons evil demons often Male; benevolent gods are Femaleoften Male; benevolent gods are Female

Cosmic Womb Cosmic Womb primal female gives birth primal female gives birth to the Universeto the Universe

Page 5: Evolution of Cosmologies

Cosmic WombCosmic Womb

This is an original ideaThis is an original idea

the entire Universe was created in a the entire Universe was created in a single eventsingle event

Also suggests a connection between Also suggests a connection between organic and inorganic material as all were organic and inorganic material as all were created in the same placecreated in the same place

Note that in this model, man and nature Note that in this model, man and nature are inseparableare inseparable

Page 6: Evolution of Cosmologies

The Mythic UniverseThe Mythic Universe

Contains a great number of parameters (e.g. Contains a great number of parameters (e.g. demons and gods)demons and gods)

Is highly qualitative/behaviorist in nature (no Is highly qualitative/behaviorist in nature (no math)math)

Is not a peaceful, harmonious place, but rather a Is not a peaceful, harmonious place, but rather a place of fierce and feuding Gods that ultimately place of fierce and feuding Gods that ultimately produces a cataclysm that leads to re-birth. produces a cataclysm that leads to re-birth.

Is shaped by the whims of the gods and appears Is shaped by the whims of the gods and appears not to have much ordernot to have much order

Page 7: Evolution of Cosmologies

Fundamental Forces

Starting around 600 BC the Greeks developed this sense:

All the world can be understood as an interaction between 4 primal elements: Air, Earth Fire and Water.

Page 8: Evolution of Cosmologies

Air, Earth, Fire and Water

Table of Elements ordering the Cosmos and removing the Chaos

However, given their hierarchical nature, various Greek philosophers attempted to make one of these elements more fundamental than the others.

Thales water for there must be some natural substance, either

one or more than one, from which the other things come-into-being, while it is preserved -- Thales

Anaximenes Air (stars are fires in the sky fire now subservient to Air)

Page 9: Evolution of Cosmologies

More World Views

Anaximander thought of the primal elements as opposites in conflict (e.g. Fire vs Water, Air vs Earth)

Anaximenes had a different conception: the primal elements are not opposed, but different stages of a continuum.

Air is most important because other elements “condense out of it”. Air is the nearest to an immaterial thing; for since

we are generated in the flow of air, it is necessary that it should be infinite and abundant, because it is never exhausted.

Page 10: Evolution of Cosmologies

Alternate ViewpointAlternate Viewpoint

DemocritusDemocritus (500 BC) (500 BC) The Universe consists of The Universe consists of atoms and the Void; all else is opinion and illusionatoms and the Void; all else is opinion and illusion The Atomists argue that visible change in the Universe is The Atomists argue that visible change in the Universe is a consequence of RANDOM rearrangement of atoms a consequence of RANDOM rearrangement of atoms interacting in an infinite void.interacting in an infinite void.This provides and answer to Parmenides who claims it This provides and answer to Parmenides who claims it impossible for “something to come from nothing”impossible for “something to come from nothing”In the atomist view, new stuff randomly comes into In the atomist view, new stuff randomly comes into “being” in the Kosmos all of the time, but all of this stuff “being” in the Kosmos all of the time, but all of this stuff is impermanent as is everything that is observed is impermanent as is everything that is observed currently.currently.

Page 11: Evolution of Cosmologies

Alternate ViewpointAlternate Viewpoint

This alternate viewpoint was not culturally This alternate viewpoint was not culturally acceptable to the strong Greek desire for acceptable to the strong Greek desire for logic logic and orderand order and hence the idea was essentially and hence the idea was essentially dismissed (but still recorded)dismissed (but still recorded)The atomist view point also requires there to The atomist view point also requires there to be a void – which according to Aristotle and be a void – which according to Aristotle and followers, is a logical impossibilityfollowers, is a logical impossibilityIn the atomist view The Universe runs by itself In the atomist view The Universe runs by itself there is no order there is no order no need for physical no need for physical laws laws just like Max Planck says 2500 years just like Max Planck says 2500 years laterlater

Page 12: Evolution of Cosmologies

Cause and Effect

If Nature functions by a set of ordered and rational physical laws, then does it not make sense to structure society so it too is "governed" by a set of rational laws? After all, science says …

Now we have CAUSE and EFFECT and the first hints of the physical nature of the Universe. The question is whether the CAUSE is due to human behavior or to the natural physics of nature. It is often difficult, through observations alone, to distinguish between these alternatives.