Origins of the Universe

How did it all get here? How did it all get here? MANY THEORIES!!!! MANY THEORIES!!!! Big Bang Theory Big Bang Theory Steady State Theory Steady State Theory Oscillating Theory Oscillating Theory Creation Theory Creation Theory Intelligent Design

Origins of the Universe A. Universe is expanding - Edwin Hubble - in 1929 announced his theory that the universe theory that the universe is continually is continually expanding expanding  studied light from distant stars distant stars

Origins of the Universe - Red shift - a shift in the expanding wavelengths of light toward the red color  caused by object that is producing light moving away from us, the observers of that light  suggests that space itself is expanding

Origins of the Universe -all galaxies are moving away from center of universe B. Expansion implies that at some point the at some point the universe was smaller universe was smaller - if it is expanding, the universe must the universe must have been smaller have been smaller

Big Bang Theory Theoretical Origins of the Universe - most widely accepted among scientists at the present

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.

Big Bang Theory Main Premise:  the universe began with a gigantic explosion billion years ago  nothing existed before this  NO time, NO space  out of nothingness came everything in the universe and it started to expand

Where is Theory found?  Authored and thought of by several scientists based on work of Hubble’s red shift

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

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

Timeline: 3. After ~1million years  the expansion and cooling allowed hydrogen to form - now hydrogen is the most abundant element in the known universe

Timeline: 4. This allowed the formation of other elements, then stars, planets, etc.

Timeline: 5. Eventually life evolved from non-living precursors, and eventually into the life we see on Earth.

Timeline: 6. Maybe life evolved on other planets in our galaxy or other galaxies as well?

Timeline: 7. The future of the universe - still expanding but for how long? - gravity from all existing objects pulls against this expansion - 3 possible outcomes 1. 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)

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

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?