Faraway star is roundest natural object ever seen
A star 5,000 light-years from Earth is the closest thing to a perfect sphere that has ever been observed in nature, a new study reports. Stars, planets and other round celestial bodies bulge slightly at their equators due to centrifugal force. Generally speaking, the faster these objects spin, the greater the force and the larger the bulge. The star, Kepler 11145123, is 1.86 million miles is diameter. Yet researchers found that its equatorial and polar diameters differ by a mere 3.7 miles.
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