I wasn't sure which forum this belonged in so if this is the wrong one I apologize. As a Christian, I have always been told that the world is around 6,000 years old, however, often times we are told that the world is much older. We are told that the world is actually billions of years old! There's a huge gap between 6,000 and a billion. My cousin and I were talking about history earlier today and he said that black people populated the world 92,000 years before white people came about which made me wonder further. This one of the debates that I have a hard time sorting out so I came here to see what you guys had to say. It's a difficult position to be in. The more educated you become the more questions that start to develop in your head in regards to your faith.
First, traditional Christianity is Christianity that is historically informed. We include Catholic, Orthodox and Protestant. But our Protestants tend to look to the original 16th Cent Reformers, as well as classic recent theology and also the Church Fathers. That means that we are not the same as conservative Christians. Conservative as used in CF tends to mean Protestants who believe in a certain concept of Scripture often called inerrancy. Not all traditional Christians believe in that, though some do. Some of us think inerrancy is a relative recent idea, and that traditional Christians dont have to accept it.
So the answer to your question is, it depends.
If you accept the answers of astronomers and other scientists, the universe and earth are billions of years old. Wikipedia actually has quite good articles on this.
The people who tell you 6000 years are what I called conservatives. They believe the Scripture was inspired by God in such a way that everything in it is true. Not just that Jesus came to save us, but every historical event that it talks about, and the specific 7 days of creation. Some conservatives are prepared to accept the days as a term that might mean a longer time. So some conservatives will agree that earth is as old as astronomers say it is. But the more literal understanding is that the earth was created in 7 days, and that the genealogies in the Old Testament go all the way back to creation. So using the lifetimes of people as listed in the Bible plus the genealogies we can compute how old the earth is. 6000 isnt exact, but thats approximately the age you get from the genealogies.
So the answer is either billions or 6000, depending upon what you think about the Bible. Many of us think that God spoke through the apostles and prophets who wrote the Bible, but that he didnt intend them to teach science. So if you know how the earth was created you should ask astronomers. If you want to know why God created it and what our place is in Gods plan you should look at the Bible.
We cant tell you what to believe there.
The idea that science and religion are at war with each other is largely a 19th Cent view. Atheists publicized it, to try and undermine Christianity. I accept the medieval two books view. That says that God gave us two ways to understand him, the Bible and nature. So its equally valid to learn things from the Bible and science. Since science speaks very clearly on the age of the earth, and the Bible doesnt seem to intend to teach us the age of the earth, I accept the scientific view. (The Bible never talks about how old the earth is. To get 6000 you have to use the genealogies in a way that they may not have been intended to be used.)
However I have to say that my view does lead to issues when it comes to the history of the early Old Testament. If you start accepting evidence from science, archaeology, etc., you should be aware that most archaeologists (other than special Christian archaeologists) dont think Noah or even the Exodus happened as described in the Old Testament. So the issue isnt just creation. When archaeologists and the Bible say different things about the Exodus, which do we believe? I believe the archaeologists. They are looking at evidence that I think is part of the book of nature. I think the Old Testament was written late enough that they didnt have historical records back to the time of Abraham or Moses. Thus what they gave us was traditional stories about those times. I still believe that God called Israel and made a covenant with it, but the events werent quite as described in the early books of the Old Testament.
While many traditional Christians will agree with me about how old the earth is, I suspect not as many will go along with the idea that the Exodus is largely legendary.