Talking about the roundest star, Kepler 11145123 is the roundest perfect star ever discovered in the Universe with about of 5000 light-years from Earth. Earth is not perfect round but rather oval, the sun measures 10 kilometers more in radius at the equator than at the poles. Those cosmic objects can never be round since centrifugal force can flatten them as they spin into elliptical shape around the equator.
But Kepler 11145123 maintains its perfect shape with a mean radius of 1.5 million kilometers, and the equatorial radius is just 3 kilometers more than the polar radius. The star became the center of attraction among astronomers showing the perfect shape glowing in the space.
As reported byMichelle Starr of CNET, “Laurent Gizon from the Max Planck Institute for Solar System Research and the University of Göttingen and his colleagues used the star’s oscillations, or periodic expansions and contractions that can be detected in the star’s brightness, continuously for over four years to measure its roundness. Different modes of oscillation are sensitive to different latitudes. This sensitivity allows the researchers to compare them. The star is less elliptical than its slow rotation, three times slower than the sun, would account for. According to the team, magnetic fields could make the star look more spherical.”