AP BIOLOGY

Detailed explanation-1: -The universe is (nearly) 14 billion years old, astronomers confirm. With looming discrepancies about the true age of the universe, scientists have taken a fresh look at the observable (expanding) universe and have estimated that it is 13.77 billion years old (plus or minus 40 million years).

Detailed explanation-2: -Measurements made by NASA’s WMAP spacecraft have shown that the universe is 13.7 billion years old, plus or minus about 130, 000 years.

Detailed explanation-3: -The Big Bang was the earliest known event in the universe. We can trace the history of our universe back about 14 billion years, to a fiery period known as the Big Bang. At that time, the universe was extremely hot and dense.

Detailed explanation-4: -Astronomers have determined that our universe is 13.7 billion years old.

Detailed explanation-5: -We can see objects up to 46.1 billion light-years away precisely because of the expanding universe. No matter how much time passes, there will forever be limits on the objects we can observe and the objects that we can potentially reach.