The Big Bang

If the Big Bang theory is correct, at the instant that it occurred it was and is still the largest explosion in the history of the universe.  By using the speed that objects are moving and how quickly they are moving away from each other, scientist have hypothesized that the universe is 15 billion years old. In the first few seconds after it occurred, there was so much going on, in such a small amount of time that scientists from broke it down into "plank seconds."  Theoretically, this is the smallest time measurement that will ever be possible.  In every second, there are 10 ^43 plank seconds.  There are more plank seconds in one second than there have been seconds, since the Big Bang.  After about one to three minutes had passed since the creation of the universe, protons and neutrons began to react with each other to form deuterium, an isotope of hydrogen.  Deuterium, or heavy hydrogen collected together to form tritium.  These were the first two elements that were formed.  In the next three minutes helium was formed and over the next fifteen billioin years, here we are today.  

Looking deep into the universe is essentially the same thing as looking into the past.  A huge question that percists is weather the universe is finite.  Is there a definate end to it?  This will be the next blog topic.