Like something out of a sci-fi show.

KNOXVILLE, Tennessee (AP) -- A comet that unexpectedly brightened in the last couple of weeks and is now visible to the naked eye is attracting professional and amateur interest.

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The comet is exploding and its comma, a cloud of gas and dust illuminated by the sun, has grown to be bigger than the planet Jupiter. The comet lacks the tail usually associated with such celestial bodies but can be seen in the northern sky, in the constellation Perseus, as a fuzzy spot of light about as bright as the stars in the Big Dipper.

Now if only it caused random comic-book-esque mutations in the population at large.