Is the Sun the only source of energy?

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Offline Joe L. Ogan

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Is the Sun the only source of energy?
« on: 09/07/2010 22:46:28 »
Is the sun the only source of energy?  All of my life I have heard that the sun is the source of all energy.  Is this really true?  I can think of some other sources of energy.  Thanks for comments.  Joe L. Ogan

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Offline imatfaal

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Is the Sun the only source of energy?
« Reply #1 on: 10/07/2010 10:50:44 »
Geothermal? Although I guess it all originates from the gravitational attraction of the sun causing the original planetary disc to form. Nuclear Fission? Heavy Elements formed in other stars in the distant past and distributed when they blew off outer layers.  Nuclear Fusion?

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Offline graham.d

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Is the Sun the only source of energy?
« Reply #2 on: 12/07/2010 10:29:22 »
I think it is reasonable to say that although most of the energy somehow oroginates from the sun or as a result of the presence of the sun, but if the sun were suddenly to disappear there would still be energy being originated from other sources:

Tidal energy from the moon
Radioactive decay within the earth
Impacts from space (without the sun to retain and attract meteorites and comets these would be less)
EM radiation and particles from space

The earth would definitely cool without the sun, so em radiation away from the earth would be in excess of that being received for a considerable time.