R. García-Salcedo; Claudia Moreno
Description:
One of the subjects that attracts the attention of the high school students are the related with Universe. In this work the fundamental hypotheses based in the astronomical observations are described to construct a Universe model. The Friedmann equation that describes the evolution of the Universe is deduced without the use of the Einstein's general relativity theory. Of the other hand, a thermodynamic equation that helps us to complement the study of the evolution of the Universe is deduced. Finally, some solutions to these equations to describe some stages of the Universe are discussed.