When the pressure and temperature of a nebula increase, it can lead to the formation of protostars. As gravity causes the nebula to contract and heat up, eventually nuclear fusion can begin at the core of the protostar, leading to the formation of a new star.
During the third stage, a star expands and becomes a red giant as it runs out of hydrogen fuel in its core. The core contracts and heats up, causing the outer layers to expand. Eventually, the star will shed its outer layers to form a planetary nebula, leaving behind a dense core called a white dwarf.
Under the influence of its own gravity, a nebula contracts, spinning faster and faster as it does. This is called is called conservation of angular momentum. Because of the spinning, the nebula flattens out to form a disk. As it continues to flatten and spin, it becomes denser and hotter, particularly in the center. This dense, hot center eventually forms into a star, the sun. The swirling mass destined to become a solar system is usually referred to as the solar nebula.
Gravity is the force that holds matter in a nebula together. As the nebula contracts under its own gravity, the particles begin to clump together, eventually forming stars and other celestial bodies.
A nebula collapses primarily due to gravitational forces overcoming internal pressures. As the gas and dust within the nebula begin to clump together under their own gravity, the density increases, leading to a rise in temperature and pressure at the core. This process can be triggered by external events, such as shock waves from nearby supernovae or the collision of molecular clouds. Eventually, the collapse can lead to the formation of stars and planetary systems.
A supernova occurs.
After a nebula contracts and its temperature increases to 10 million K, it can start nuclear fusion in its core, becoming a protostar. The increase in temperature and pressure triggers the fusion of hydrogen atoms into helium atoms, releasing energy in the form of light and heat. The protostar will continue to evolve and eventually become a full-fledged star.
A supernova occurs.
If there is sufficient mass and material it will contract due to gravity it may then become a star. The type of star depends on how much mass was present
When the pressure and temperature of a nebula increase, it can lead to the formation of protostars. As gravity causes the nebula to contract and heat up, eventually nuclear fusion can begin at the core of the protostar, leading to the formation of a new star.
A nebula.
During the third stage, a star expands and becomes a red giant as it runs out of hydrogen fuel in its core. The core contracts and heats up, causing the outer layers to expand. Eventually, the star will shed its outer layers to form a planetary nebula, leaving behind a dense core called a white dwarf.
A supernova occurs.
Under the influence of its own gravity, a nebula contracts, spinning faster and faster as it does. This is called is called conservation of angular momentum. Because of the spinning, the nebula flattens out to form a disk. As it continues to flatten and spin, it becomes denser and hotter, particularly in the center. This dense, hot center eventually forms into a star, the sun. The swirling mass destined to become a solar system is usually referred to as the solar nebula.
it contracts together to were it can't hold any more.
Gravity is the force that holds matter in a nebula together. As the nebula contracts under its own gravity, the particles begin to clump together, eventually forming stars and other celestial bodies.
It formed the sun!!