21.%20Origin%20of%20the%20Earth

21.%20Origin%20of%20the%20Earth - Origin of the Earth...

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Origin of the Earth Lecture 2 Galactic Measurement Galactic Measurement z Distance measured in Light Years z Distance light travels in one year { 186,000 mi/sec { 11,160,000 mi/min { 669,600,000 mi/hr { 16,070,400,000 mi/day { 5,869,713,600,000 mi/yr z Earth is 8 light minutes from the sun Lecture 2: Origin or the Earth Page 1 of 17
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UNIVERSE UNIVERSE – The Cosmos The Cosmos z Theories of the Origin { Big Bang Theory { Steady State Theory { Oscillating Universe Theory z Mostly “empty” space { Chance of 1:10 33 to “arrive” near a body { 10 11 Galaxies z Each with 100 billion stars z Earth is in the Milky Way Galaxy z 26,000 light years from the center Solar System in the Milky Way Solar System in the Milky Way Lecture 2: Origin or the Earth Page 2 of 17
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Evidence for the Big Bang Evidence for the Big Bang z Red Shift { Stellar light is shifted toward a longer wave length as distance increases Doppler Effect Doppler Effect z Changes wave length as a source moves relative to a stationary source Lecture 2: Origin or the Earth Page 3 of 17
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Red Shift Red Shift z Light is shifted toward the red (longer wave- length) z Thus source of light is moving away z Expanding universe caused by the energy released by the Big Bang Steady State Theory Steady State Theory z The Universe is in steady state equilibrium z The red shift shows expanding system z System is not fixed Lecture 2: Origin or the Earth Page 4 of 17
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21.%20Origin%20of%20the%20Earth - Origin of the Earth...

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