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Is the Sun Running Out of Juice?

What if the sun's magnetic field weakened so much that it wasn't able to muster the strength to produce a single sunspot? According to solar astronomers, that's not such a silly question.

September 16, 2010
2:19 PM EDT
WATCH VIDEO: A solar eruption sends a wave of plasma hurtling towards Earth on August 1st, 2010. The event was captured by NASA satellites