Date: 1993 - 1999
Where does the sun get its fuel?
The sun runs on hydrogen, which is what it is made of - it is very
gradually consuming itself! Because the fusion reactions it uses create so much
energy, the sun will continue to shine for a long time - probably another 5
billion years. The fusion (converting hydrogen into helium) occurs only in the v ery deepest part of the
sun, which is extremely hot (millions of degrees), and this heat gradually
filters out to the outer layers which are only a few thousand degrees, and this
heat is then radiated into space as light.
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Update: June 2012