Gold, like other elements, is thought to have formed through a process known as nucleosynthesis. During nucleosynthesis, heavy elements, including gold, are created through nuclear reactions that occur within stars. Here's a brief overview of the process:

1. Supernovae Nucleosynthesis: The primary source of gold formation is believed to be supernovae, which are powerful explosions that occur at the end of a star's life cycle. During a supernova, the intense heat and pressure generate the conditions necessary for nuclear fusion, combining lighter elements into heavier ones.
2. Dispersion into Space: Following the supernova explosion, the newly formed gold isotopes, along with other heavy elements, are dispersed into space. This material becomes part of the interstellar medium, from which new stars, planets, and other celestial bodies can form.
3. Incorporation into Earth: When our solar system formed about 4.6 billion years ago, some of the material from previous generations of stars, including gold, became incorporated into the solar nebula. As the solar system evolved, this material contributed to the composition of the Earth.

While the majority of gold on Earth is thought to have originated from supernovae, other processes, such as neutron star collisions, may also contribute to the production of gold and other heavy elements. Gold is relatively rare in the Earth's crust, and its extraction and mining have been central to human civilizations throughout history due to its value and various applications.