Jack+M+-+Wonders+of+Science

WONDER QUESTION: Will the world end?
 * When the sun dies, earth will die.
 * I know the world won't end in 2012 like in the movie.
 * Our Sun is about 4.57 billion years old. About half way through its life.
 * How long does the sun, our star, have left.
 * Astronomers have calculated that the sun has enough hydrogen in its core to last another 7 billion years.
 * The earth will not end because of the sun burning out in my lifetime.

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