The stars rotate much more slowly than planets. The sun, for instance, makes a full rotation one every 27 earth days. These results in the sun's shape being quite round, but still not a complete circle. The star which resides around 5000 light years away from earth is called Kepler 11145123.
Scientists have discovered that it rotates very slower and this may be the partial reason why it is so round. However, the star is almost twice as big as the sun. This, in theory, doubles the starmagnetic force. In essence, its size should result in a highly elliptical shape.
Scientists from NASA are still not sure why the star is so round. "This makes Kepler 11145123 the roundest natural object ever measured, even more, rounder than the sun, It will be particularly interesting to see how fast, rotation and a stronger magnetic field can change a star's shape," said Laurent Gizon from NASA. "An important theoretical field in astrophysics has now become observational."
KEPLA was specifically created for missions such as this, finding cosmic bodies far away from the earth. KEPLA uses light projections to look discover new planets, and it also uses the light projections also to estimate the shape of the body.