Let’s
look at the entire history of the Universe as though it took place in a single day.
The present is at the stroke of midnight
at the end of that day. Since it is about 12 billion years old, each hour will be
worth 0.5 billion years. A million years
takes only a little over 7 seconds.
The Big Bang
(as an opaque fireball) and the formation of H and He all take place in the
first nanosecond. The Universe becomes
transparent in about 2 seconds. The first stars and galaxies appear after about
2am, and our Galaxy forms
at perhaps
4am. Generations of stars are born and die.