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There is a book entitled "Starlight and Time" by Dr. Humphries which describes the math of the time dialation effect. The idea is that time itself is changed by the expansion of the universe. Therefore, the earth being at the center of this expanding universe would be truly younger than distant stars in terms of local time.
Who wrote the Bible? Yes, we have an answer.
Who created the Earth, the stars, the Sun and the Moon?
Yes, we have an answer in the Bible?
When, that is, how many years back did God create it? We have no answer!
So, the the age of Earth can't be found out!
God created Adam as a grown man, so if a scientist walked up one minute after God finished creating Adam, and said Adam was 30 yrs old, Adam would have said, Um, no, I'm a minute old. God just created me. Same with the stars and their light.