The Big Bang

The leading model for the beginning of the universe is know as the Big Bang. In a nutshell, it is the idea that the universe began with an explosion and this caused everything to be created and expand out. This model honestly sounds ridiculous and untrue but, considering the evidence it really makes sense.  The reason scientists agree that the universe is expanding is because, when supernovas explode they show the same amount of light, and the light appears red. According to the Doppler effect the red light means it is moving away from us. Using the supernova we have found a trend that the farther the star is away from us the faster it is moving away. So therefore if the universe is expanding then, it must have started out smaller. I think this model is very reliable but, for me it is hard to understand all of the theories behind it and I question some of the elements of the Big Bang. For example, I don't understand how the universe finds the room to grow if there is "nothing there". In a video about the big bang from http://virtualgardnerblogs.weebly.com/integrated-earth--physical-science.html the speaker discussed the possible outcomes of the big bang. One I particularly thought was interesting was the idea that the universe would go thorough a process where there was stars and galaxies, followed by black holes, and then filled with emptiness. He said that emptiness gives off radiation and the universe could then go through the process again. Therefore, the Big Bang may not have been the beginning, but may be part of a process. Although I can't wrap my brain around these concepts completely, it does cause me to think about what new discoveries can prove about how the universe came to look the way it does now.