a star becomes a star when enormous amounts of gases (particularly hydrogen) in outer space come together, and gravity slowly pushes the gas in on itself. eventually, there is so much pressure and heat that nuclear fusion begins to occur, causing pairs of hydrogen atoms to bind together and make helium, helium pair start to make lithium, then borillium, and so on and so forth all the way down the Periodic Table. nuclear fusion gives off enormous amounts of energy in the form of heat and light, which is why the sun gives us heat and why we can see stars.
The onset of iron fusion causes a star to become a supernova. This process occurs when the star's core collapses due to the inability to support the fusion of iron, leading to a catastrophic explosion.
That would mainly depend on the star's mass.
A planet cannot become a star. A star is an object that is massive enough to release energy via nuclear fusion. A planet is much less massive.
A giant star would experience a supernova explosion, in order to become a white dwarf.
They Collide and become part of another star which causes Stars to be come Parts of other Stars.
What causes star to evolve is mass.
Gravity will cause a star to become smaller, because it pulls matter towards the star's core and causes it to contract. On the other hand, nuclear fusion will cause a star to become larger, because it produces an outward pressure, pushing the star's matter outwards and causing it to expand.
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As a giant star expands, its surface area increases, allowing more energy to escape from its core. This increased surface area results in the star appearing more luminous. Additionally, the expansion causes the outer layers of the star to become less dense, which allows more light to escape and contribute to its overall brightness.
after the star dies it has the potential to become a dwarf
Gravitational attraction pulls gas and dust together in a nebula, causing it to condense and heat up. When the pressure and temperature in the core of the nebula become high enough, nuclear fusion reactions begin, initiating the process of becoming a star.
The matter making up the star condenses