Book of spirits: records from the river of time

In the beginning of the galaxy, many event overlapped and conspired with one another to make the place that we know of today, and all forms of life in the milky way have had historians and researchers to record the major events that happen in their lifetime and find how the universe really started and what happened to produce something as large and mysterious as the place we live.
In their efforts, these people are rewarded when they leave their bodies and become only their soul, only then will they have the ultimate reward they have always sought their entire lives: The galaxy's history.