![NGC3982](https://www.astronomy.com/wp-content/uploads/sites/2/2023/02/NGC3982.jpg)
Face-on spiral galaxy NGC 3982. NASA/ESA/the Hubble Heritage Team (STScI/AURA)
The force of gravity makes some objects, such as the Sun, spherical. Spin plus gravity equals a rotating disk with a vertical thickness much less than its radius.
The force of gravity makes some objects, such as the Sun, spherical. Spin plus gravity equals a rotating disk with a vertical thickness much less than its radius.