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Big Bang Theory
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Cosmology Study of deep space and the dynamics of universe other galaxies stars (nebula, supernova…) origin of the universe black holes
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Big Bang explained Watch for review
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Big Bang Theory 13.7 bya Entire universe was once a dense, hot, supermassive ball (singularity). Expansion(bang) hurled material in all directions Allmatter/space/time created in that instant
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Steven Hawking- Big Bang
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Evidence that supports the Big Bang Theory
1.Cosmological Red Shift- all galaxies (outside the Local Group) are showing a red shift
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Equal expansion
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Hubble’s Law Farther galaxies are receding faster
Even space is expanding!
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What is the universe expanding into?
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2. Cosmic Background Radiation- Microwaves
If the universe started HOT, there should be heat leftover Heat was found as microwaves (Penzias and Wilson calculated the exact temperature this radiation would have cooled to since the Big Bang- Nobel Prize 1978)
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The correct amount and temperature!
NASA’s COBE and WMAP satellite able to detect cosmic microwaves The correct amount and temperature!
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PLANCK image of CBR
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3. Abundance of light elements
Universe is full of abundant H and He
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Big Bang theme song Yv_Z4SI8
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Misconceptions about BB
No center Didn’t start BIG Doesn’t explain ORIGIN of universe Not an explosion Expansion
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Future of the Universe? Keep expanding-
-Universe will last forever Data supports this Big Crunch- Gravitational contraction- Big Bang in reverse- no data to support this BIG RIP
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Big Rip VFRpOR8
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What caused the big bang?
Let’s have the noble prize winner in physics tell you.. mLp3Vs&safe=active
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Dark Matter 2O_8wBUQ
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