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a). Every second the Sun loses energy due to its luminosity. Ignoring any new energy created...

a). Every second the Sun loses energy due to its luminosity. Ignoring any new energy created through nuclear fusion, estimate how much the Sun's radius changes every second due to this energy loss. Does it get smaller or larger? b). Your answer in part b should predict that the sun's radius will reach 0 in about 10 million years. Is this prediction correct?

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