Now, Nardan is multiple light years from the Earth. It is starting as a stellar nebula, which is the first stage of a star that is attempting to acquire equilibrium between gravity, the pressure on the core, and the temperature.
Hi! My name is Nardan and i'm a stellar nebula, and one day I will become a star!
A protostar is a star that subsequently comes after the stellar nebula. It is a young star, and is where nuclear fusion begins to take place later on. It contains a lot of heat, and pressure builds up inside of it.
I am now a protostar! I changed from a stellar nebula to this!
Eventually, nuclear fusion occurs in the protostar, and turns into an average star. This is the stars equilibrium, and contains a lot of heat.
I have now grown to be an average star!
As the star begins to heat up even more, simultaneously it begins to burn up it's fuel, and becomes almost 1000 times larger.
I am now a red giant!
Following the star losing the energy it has left, it loses layers and heat, and becomes a planetary nebula.
I have no energy left and have turned into a planetary nebula.
Finally, after losing energy and turning to a planetary nebula, the nebula has become a dense star with no energy left. The star still contains a lot of heat, but it is nearing the end of it's life cycle.
I am now at the end of my life cycle, and have turned into a white dward.