The Big Bang
The Big Bang theory is an effort to explain what happened at the very beginning of our universe.The theory is based on the mathematical equations, known as the field equations, of the general theory of relativity set forth in 1915 by Albert Einstein, and Edwin Hubble. Hubble made the observation that the universe is continuously expanding.Another observation is that the universe is expanding in every direction.. Discoveries in astronomy and physics have shown beyond a reasonable doubt that our universe did in fact have a beginning. Prior to that moment there was nothing; during and after that moment there was something: our universe. The big bang theory is an effort to explain what happened during and after that moment. After its initial appearance, it apparently inflated ("Big Bang"), expanded and cooled, going from very, very small and very, very hot, to the size and temperature of our current universe. Since the Big Bang, the universe has been continuously expanding and, thus, there has been more and more distance between clusters of galaxies. This phenomenon of galaxies moving farther away from each other is known as the red shift.It continues to expand and cool to this day and we are inside of it: incredible creatures living on a unique planet, circling a beautiful star clustered together with several hundred billion other stars in a galaxy soaring through the cosmos. The Big Bang happened approximately 15 billion years ago.
The Big Bang theory is an effort to explain what happened at the very beginning of our universe.The theory is based on the mathematical equations, known as the field equations, of the general theory of relativity set forth in 1915 by Albert Einstein, and Edwin Hubble. Hubble made the observation that the universe is continuously expanding.Another observation is that the universe is expanding in every direction.. Discoveries in astronomy and physics have shown beyond a reasonable doubt that our universe did in fact have a beginning. Prior to that moment there was nothing; during and after that moment there was something: our universe. The big bang theory is an effort to explain what happened during and after that moment. After its initial appearance, it apparently inflated ("Big Bang"), expanded and cooled, going from very, very small and very, very hot, to the size and temperature of our current universe. Since the Big Bang, the universe has been continuously expanding and, thus, there has been more and more distance between clusters of galaxies. This phenomenon of galaxies moving farther away from each other is known as the red shift.It continues to expand and cool to this day and we are inside of it: incredible creatures living on a unique planet, circling a beautiful star clustered together with several hundred billion other stars in a galaxy soaring through the cosmos. The Big Bang happened approximately 15 billion years ago.
Above are pictures that show the universe and how it still hasn't stopped expanding.