Thursday Nov 10

Thursday Nov 10 - 17:34 ThursdayNov10,TheSun...

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17:34 Thursday Nov 10, The Sun William Thomson, 1 st  Baron Kelvin kelvin and Helmholtz proposed that the sun gernaerated energy by  gravitational  contractrion  as the sun’s gas shriks, its  gravitational   potential   energy  is turned into  heat this method could keep the sun hot for 25 million years There is a problem with the theory of gravitational contraction these rocks are 2.5 billion years old in Canada. earth has been around for than 2.5 billion years so the sun would have gone out long ago sun is 4.5 billion years old Alberit Einstein  E= mc2 energy n the sun is generated by nuclear fusion which turns mass into energy .. but it requires extremely high temperatures and densities to occu fusion is the only souce of energy hat could sustain the sun for 4.5 billion years  sunlight is white when an atom loses an elctron becomes ionized If many of the atoms in a gas are ionized the gas becomes a plasma The Sun
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Thursday Nov 10 - 17:34 ThursdayNov10,TheSun...

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