World orbits its star faster and closer than any other found so far.
A planet called WASP-12b is the hottest planet ever discovered (about 4,000 degrees Fahrenheit, or 2,200 degrees Celsius), and orbits its star faster and closer in than any other known world.
This sizzling monster whips its way around its parent star about once a day (for comparison, the fastest-circling planet in the solar system, Mercury, orbits the sun once every 88 days).
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