The universe is expanding: this is a discovery that has transformed the study of modern cosmology. This idea has been initially backed by the observations of Edwin Hubble and changed the perspective of humankind on the structure of the cosmos. Using the analysis of redshift of far galaxies, Hubble was able to show that the galaxies are drifting away, thus creating the illusion that the space itself is expanding with time.
This theory is based on the Big Bang Theory that suggests that the universe had a very hot and dense nature some 13.8 billion years ago. With the growth of galaxies, they move away, affecting the cosmic evolution and the creation of the large-scale structure.
The Cosmic Microwave Background is some evidence which supports this model, a faint radiation field observed to be uniform throughout space. This background radiation is thermal evidence of the early universe, and can be used to provide quantitative validation of the Big Bang model.
Recent devices like the Hubble Space Telescope have brought a deep-field image of billions of galaxies that are far away. The observations are used to estimate the rates of expansion and improve cosmological constants among the scientists.
The rapid expansion of the universe brings the idea of the dark energy- the unknown element that is thought to push the galaxies further and further each day. Though not directly measured, its effects can be determined by the data of supernovas and the studies of galactic movements.
CHUMASHCASINOSANTAYNEZ.NET dwells upon the cosmic science as a peephole into the quest of knowledge by people. Expanding universe is one of the greatest discoveries of the contemporary astronomy, which keeps on challenging and developing the knowledge.