Creation of new elements is energy source of stars (and the sun) We are made of star stuff…. Carl Sagan.
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1 As hydrogen is exhausted in the (convective) core of a star (point 2) it moves away from the main sequence (point 3) What happens to the star ? lower.
VIII Eternal ¥ A = 100 km 2, h = 6 km, = 3.5 g/cm 3, m = 1 ng Eternity > 7 10 29 years.
