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The universe likes to be shy about its age, but astronomers believe they have a pretty good idea of the range.
Currently, the most widely accepted age for the universe is around 13.8 billion years, but determining the age of…well, everything, is no easy feat（ 功 绩 ）.Now new studies have investigated the question using different methods-and they've come up with two different answers, separated by more than a billion years.
Because the universe is expanding at an accelerating pace, the further away an object is, the faster it appears to be moving away from us.This is expressed as the Hubble constant（哈勃常数）, and it's a key factor in figuring out the age of the universe.After all, if we can determine how fast moving away from us, we can rewind that process to its
beginning-the Big Bang. Researchers from the University of Oregon set out to map the distance to dozens of galaxies.
The team calculated that the universe is only 12.6 billion years old-that, you might notice is much younger than the 13.8 years usually stated.
In the second study, the method of figuring out the age of the universe is by mapping the oldest light we can detect.We are restoring the 'baby photo' of the universe to its original condition, removing the wear and tear of time and space that
distorted（扭曲）the image, says Neelima Sehgal, co-author on the study.Only by seeing this sharper baby photo or image of the universe can we more fully understand how our universe was born.In doing so, the researcher determined that the universe is 13.8 billion years old-in agreement with the accepted age.
The real problem though, is that the studies disagree so wildly with each other, to the tune of a billion years. But they are not the only ones-the battle lines are commonly drawn by the methods used. Obviously, more research is heeded to determine where the truth lies.
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