Replying to I have a question.

We created a year by the idea that a sphere circles around a star. Now the universe is 13.8 billion years old, how can it be 13.8 billion years old when a year is the total time is takes the earth to travel around the sun, which wouldn’t of existed when the solar system wasn’t formulated into its present day configuration. So the concept of a year is contingent on a very specific formation. Thus the concept of a year can’t exist at the beginning of time. It seems quite random. I mean do we really no anything?

I scored low on my SAT’s and I am not an astronomer.