Lecture_02 - LECTURE 2: EARTHS ORIGIN AND INTERNAL...

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Lecture 2. Revised 8/08 1 LECTURE 2: EARTH’S ORIGIN AND INTERNAL STRUCTURE 1.0 ORIGIN OF THE UNIVERSE STATIC THEORY - UNIVERSE HAS NO BEGINNING OR END AND IS INFINITE PROBLEMS POSED BY STATIC THEORY – CONTRADICTS NEWTON’S 1687 UNIVERSAL GRAVITATION THEORY THAT STATES, “EACH OBJECT IN THE UNIVERSE ATTRACTS EACH OTHER BODY.” IF TRUE, THEN WHY HAS THE UNIVERSE NOT CONTRACTED?? CONTRADICTS EDWIN HUBBLE’S 1929 OBSERVATION OF A RED SHIFT (DOPPLER SHIFT) IN LIGHT COMING FROM DISTANT GALAXIES. SHIFT INDICATES GALAXIES THAT ARE TWICE AS FAR FROM US MOVE AWAY FROM US TWICE AS FAST. SHOWS UNIVERSE IS EXPANDING IN EVERY DIRECTION. DYNAMIC THEORY – HUBBLE’S EXPLOSION OF SPACE OR “BIG BANG” – IT ADVOCATES A SUDDEN COSMIC EXPANSION OF SPACE, ENERGY, AND MATTER DOMINANT SCIENTIFIC THEORY SINCE 1950s UNIVERSE PROBABLY FORMED A VERY LONG TIME AGO AS A SINGULARITY: INFINITESIMALLY SMALL, INFINITELY HOT (10 9 ºK), INFINITELY DENSE, SOMETHING!
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Lecture 2. Revised 8/08 2 INFLATED ("BIG BANG"), EXPANDED AND COOLED TO THE SIZE AND TEMPERATURE OF OUR CURRENT UNIVERSE (3.2 ºK, -270 ºC) MILESTONES AFTER BIG BANG: HIGH ENERGY DENSITY-> ELECTRONS, QUARKS, NEUTRINOS -> NUCLEOSYNTHESIS OF ATOMS AND MOLECULES-> RADIATION-> NEBULAE ->
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This note was uploaded on 09/22/2008 for the course ISP 203A taught by Professor Larson during the Fall '08 term at Michigan State University.

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Lecture_02 - LECTURE 2: EARTHS ORIGIN AND INTERNAL...

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