origins of the universe. how did it all get here? how did it all get here? many theories!!!! many...
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Origins of the Origins of the UniverseUniverse
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Origins of the UniverseOrigins of the Universe How did it all get here? How did it all get here? MANY THEORIES!!!! MANY THEORIES!!!!
Big Bang TheoryBig Bang Theory
Steady State Theory Steady State Theory
Oscillating TheoryOscillating Theory
Creation TheoryCreation Theory
Intelligent DesignIntelligent Design
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Origins of the UniverseOrigins of the UniverseA. Universe is expandingA. Universe is expanding
- Edwin Hubble - in 1929 announced - Edwin Hubble - in 1929 announced hishis
theory that the universe theory that the universe
is continuallyis continually
expandingexpanding
studied light from studied light from
distant starsdistant stars
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Origins of the UniverseOrigins of the Universe- - Red shiftRed shift - a shift in the expanding - a shift in the expanding
wavelengths of light toward the red colorwavelengths of light toward the red color
caused by object caused by object that is producing that is producing light moving away light moving away from us, the from us, the observers of that observers of that light light suggests that suggests that space itself is space itself is expandingexpanding
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Origins of the UniverseOrigins of the Universe- all galaxies are moving away from center of all galaxies are moving away from center of
universeuniverse
B. Expansion implies that B. Expansion implies that at some point theat some point the universe was smaller universe was smaller
- if it is expanding, - if it is expanding, the universe must the universe must have been smallerhave been smaller
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Big Bang Theory
Theoretical Origins of the Universe
- most widely accepted among scientists at the present
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Nobody alive was there to see this.•You are under no obligation
to believe this theory. It is simply one possible explanation among many possible explanations for the origins of the universe.
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Big Bang Theory• Main Premise: the universe began with a gigantic explosion 10-29 billion years ago
nothing existed before this NO time, NO space
out of nothingness came everything in the universe and it started to expand
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Where is Theory found? Authored and thought of by
several scientists based on work of Hubble’s red shift
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Timeline:• What we see around us (according to
the Big Bang theory)
1. Dime sized densely packed piece of matter (containing all the matter in the universe) appeared out of the nothingness and exploded
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Timeline:
2. Expansion of the universe during the first few seconds after the big bang, cooled the created matter enough for protons, neutrons, and electrons to form as free particles, but not to
become stable atoms
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Timeline:
3. After ~1million years the expansion and cooling allowed hydrogen to form- now hydrogen is the most abundant element in the known universe
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Timeline:
4. This allowed the formation of other elements, then stars, planets, etc.
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Timeline:
5. Eventually life evolved from non-living precursors, and eventually into the life we see on Earth.
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Timeline:
6. Maybe life evolved on other planets in our galaxy or other galaxies as well?
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Timeline:7. The future of the universe
- still expanding but for how long?- gravity from all existing objects pulls against this expansion
- 3 possible outcomes1. Universe expands forever
2. Expansion will gradually slow down until a size limit is reached
3. Expansion will stop and the universe will begin to contract and fall in on itself Big Crunch
** Depends on the amount of matter in the universe (and the mass)
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Evidence:
Cosmic background radiation is evidence used in support of the theory- faint radiation left over from the explosion itself
Red shift of wavelengths of light from distant galaxies
Expansion implies smaller in past
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Problems / Issues / Flaws with theory:
There was nothing, then there was something. From where did it come?
All matter in the universe in a dime sized package
Outcomes? Which will happen?