Objects in the galaxy, such as stars, planets, and even our solar system, are all made of and started off as clouds of gas and dust in space called nebulas. Then, according to (The life cycle of a star), the gravitational force of the nebula attracts surrounding interstellar mediums, or gas and dust within space to gather together and then towards the nebula. Within this process, the mediums not only cause the nebula to become denser but also creating pressure from the gas, triggering a temperature increase and expansion of the nebula. At this point, the nebula is called a protostar, where it is in the process of becoming a formal star. Then, as gas\\ and dust are collected sufficiently and the temperature of the protostar has reached a certain …show more content…
The protostar will begin fusing hydrogen molecules within itself to helium. During this process, if the protostar is capable of maintaining a balance between its gravitational force attempting to trigger the protostar to collapse, and the expansion of the protostar from temperature produced gas pressure, then the protostar becomes a main sequence star, where the star is constantly fusing hydrogen to helium, and the balance is made between inwards gravity force, and outwards high temperature, during most of the star’s life.

Additionally, according to (Formation of the Sun and Planets), nebular hypothesis is a commonly established explanation that stated: “the Sun and the planets of our solar system formed about 4.6 billion years ago from the collapse of a giant cloud of gas and dust, called a nebula.” The sun in the center of our solar system came from a nebula. As mentioned previously, nebula attracts gas and dust from its surroundings due to its gravitational force and would rotate, because of its angular momentum, where the external torque, are the interstellar mediums. While the nebula rotates and gathers interstellar mediums towards itself, the temperature produced gas pressure is causing the materials of the nebula to expand