Google is invoking the name Copernicus again, but this time it's not a joke.
The Web giant is celebrating with a doodle the 540th birthday of the Renaissance mathematician and astronomer who challenged the way people look at the universe. Nicolaus Copernicus, who was born in 1473, is perhaps best known for his heliocentric theory, which asserted that the sun, and not the Earth, was at the center of the universe.
The doodle is a representation of Copernicus' model for the solar system -- a golden sun encircled by six planets on stylized plane.
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