Stars do rotate on their own axes as they move through the universe. The rotation of a star is determined by the conservation of angular momentum. When a star is formed from a collapsing cloud of gas and dust, it inherits the angular momentum of the original cloud. As the star contracts and heats up, its angular momentum is conserved, causing it to rotate faster.

The speed of a star's rotation depends on its mass and size. In general, more massive stars rotate more slowly than less massive stars. This is because the gravitational force between the particles in a more massive star is stronger, which counteracts the centrifugal force that causes the star to rotate. Smaller stars, on the other hand, have less gravitational force and therefore rotate faster.

The rotation of a star also affects its shape. A rapidly rotating star will be flattened at the poles and bulged at the equator, due to the centrifugal force caused by its rotation. This shape is known as an oblate spheroid. The Sun, for example, is an oblate spheroid with a equatorial diameter that is about 10 km wider than its polar diameter.

The rotation of stars also plays an important role in the formation of planets and other objects in a star system. The rotation of the star creates a disk of gas and dust around the star, which can then form into planets, moons, and other objects. The rotation of the star also helps to shape the orbits of these objects.