Pictures taken by telescopes show that the earth is constantly expanding; hence, the distance between different galaxies is continuously expanding as the earth ages. This means that we aremoving far apart than we were in the past (Kaler, 2011). The speed at which the distance between these galaxies is increasingly expanding shows that this expansion has been going on for the past 14 billion years. We refer to the beginning of the expansion of the distance between galaxies as the Big Bang (Taylor, 2004).
1.) The beginning of the universe: The universe began expanding with the Big Bang which was very hot and dense. It is still expanding. However; gravity has pulled everything towards a central point, leading to the creation of galaxies.
2.) Galaxies as Planetary plants: The universe in the early days had hydrogen and helium as the only two chemicals that formed it. Everything else in the world was a product of the stars and was recycled by subsequent generations, up to the present galaxy, the Milky Way.
3.) Life Cycles of Stars: Many generations of stars have lived and died on the Milky Way. Stars are a product of a cloud of dust and some gases; planets usually create the disk surrounding stars. At night, stars shine at night. They do this with the help of the energy that is usually produced through nuclear fusion. Nuclear fusion is the ultimate manufacturer of all other elements that have a greater weight than helium and hydrogen. When big stars die, they normally explode. Their constituent elements scatter, and spread into space; hence going back to their origin. Another process of star formation then starts again.
4.) Life on the Earth: By the time the solar system was born, 41/2 billion years ago, about 2% of the original hydrogen and helium had been converted into heavier elements. We are, therefore, “star stuff” because we and the planets are made from elements manufactured in stars that lived and died long ago.
Stars and planets are formed within galaxies like the Milky Way. The force of gravity is the major driving force, which results in the breakdown of dust and gas; the primary components materials of stars. This eventually leads to the formations of stars and planets. Although stars do not have life, they have their own “life cycles.” Stars come into existence when gravity pulls together components of a cloud, until the center of the cloud becomes heavy and generates enough heat for nuclear fusion. Nuclear fusion is the process that materials with light weight usually undergo until they closely stick together and form heavy objects (Julias, 2007).
Once a star is formed its life will continue as long as it can find the energy to keep it shining (Koupelis, 2010). This energy is produced through fusion. It will only die after exhausting all its fuel. In the last days, before the death of a star, it blows often releasing its component s into the space. Supernovae is the name of the explosions in which massive stars tend to lose their lives in titanic. When the content of the dead stars gets to spaces, it freely mixes with other matter, which is usually, in the same space, and slowly develops into a new ball of dust.
This is the beginning of a new generation of other stars (Julias, 2007). As a result, galaxies are the planet’s recycling plants.
The solar system, our solar system, is as a result of subsequent generations of the recycling process. The universe in the early days had only hydrogen and helium, which are simple gases. Human beings and everything else on earth are products of elements like carbon oxygen, and nitrogen. There is enough evidence to prove that all these elements, which make us, are all products of the two initial gases, helium and hydrogen. They were hence manufactured from stars through nuclear, chemical reactions (Koupelis, 2010). The solar system is, however, the only one which was in existence 41/2 billion years ago. All other objects were produced due to several chemical reactions that involved gravity and nuclear fusion.
It is hence clear that all creatures on the universe today are a product of the stars. The stars are the primary source of everything that exists. Through nuclear fusion, they are able to produce various creatures under different degrees of temperatures. We are, therefore, “star stuff, because we and our planet are made of things that lived and died a long time ago.”