The Sun Is Almost Perfectly Round
You might expect a spinning star to bulge a lot, but the Sun barely does. Measurements found it is only about 8 parts per million out of round.Sun Shape: Why the Sun Is Almost a Perfect Sphere
Closer to a Perfect Sphere Than You Think
That tiny oblateness makes the Sun the natural object closest to a perfect sphere ever observed. Planetary tides are too weak to noticeably distort it.Sun Shape: Why the Sun Is Almost a Perfect Sphere
