Calculate the gravitational self energy of the sun (without using numbers)(adsbygoogle = window.adsbygoogle || []).push({});

Textbook says that this is the nergy needed to take every particle from the sun's surface to infinity

there are an infinite number of particles on the sun ...

would there be some sort of integral that relates the energy needed to take one particle from the sun's surface ?

something like this - for one particle mass i, energy needed ot take it out from the sun's surface [tex] U_{i}(r) = -G \frac{M_{s} m_{i}}{r_{si}} [/tex]

but since this is a 3D object how would one go about setting up an integral like this??

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# Homework Help: Gravitational energy

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