The Big Bang Theory± what some feel is the beginning to our existence. One main reason people wonder how we started out in the universe is the fact that there are galaxies and stars that are moving away from us and some that are moving towards us at a significant speed, this brings up the thought "Could and ancient explosion what caused these celestial bodies to be moving at a great speed?" Now what scientist believe happened is a giant explosion sent boulders of matter flying throughout the universe, expanding it to levels almost unbelievable. After the Big Bang, it is not exactly known how we evolved to where we are now but this is the theory on how we have the universe to the extent it is right now.
Evidence 1 - Astronomers have found that there are galaxies that are moving away from us, these movements are called "Redshifts". When you think about it, objects do not start to move on there own without being acted apon by an outside force. It is believed that the universe was much smaller than it is now but when the Big Bang occurred, this sent chunks of matter through out space making the universe expand at a great speed which apparently has not stopped growing yet due to the Big Bang. The expansion of our universe is known as "inflation".
Evidence 2 - Another major reason to believe the Big Bang theory is a substance known as "Dark Energy". This form of energy is accelerating the speed that our universe is expanding more than it should be. This is said because as there is matter in the universe while it is expanding, there is gravity that comes with that matter which should pull and slow down the expansion but what is occurring is the universe is accelerating. This movement has been dubbed the name "Dark Energy" which is believed to have been created during the Big Bang. These are just 2 forms of evidence but many more are out there such as radiation or the reason for all the different matter and substances that exist now.
Evidence 2 - Another major reason to believe the Big Bang theory is a substance known as "Dark Energy". This form of energy is accelerating the speed that our universe is expanding more than it should be. This is said because as there is matter in the universe while it is expanding, there is gravity that comes with that matter which should pull and slow down the expansion but what is occurring is the universe is accelerating. This movement has been dubbed the name "Dark Energy" which is believed to have been created during the Big Bang. These are just 2 forms of evidence but many more are out there such as radiation or the reason for all the different matter and substances that exist now.