The lifecycle of a star refers to the series of stages that a star goes through from its formation to its eventual death. This includes the formation of a star from a cloud of gas and dust, its main sequence phase where it fuses hydrogen into helium, and its eventual death as a white dwarf, neutron star, or black hole.
The length of a star's lifecycle depends on its mass. Smaller stars, known as red dwarfs, can have lifespans of tens of billions of years, while larger stars, such as blue giants, may only live for a few million years.
The force of gravity is present from the beginning of a star's lifecycle as it is the result of the mass of the star. As the cloud of gas and dust collapses under its own weight, the force of gravity increases, causing the temperature and pressure to rise and initiating the process of nuclear fusion.
In the later stages of a star's lifecycle, gravity continues to play a crucial role. As the star runs out of hydrogen to fuse into helium, the force of gravity causes the star to collapse, increasing the temperature and pressure and allowing for the fusion of heavier elements. This process continues until the star can no longer withstand the force of gravity and undergoes a supernova explosion.
Currently, there is no way to manipulate or control the force of gravity in stars. However, scientists are researching and studying the concept of gravitational manipulation through advanced technologies and theories such as black holes, wormholes, and dark energy. However, much more research and experimentation is needed before any practical applications can be achieved.