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Scientists say new readings on the the rate of the universe's expansion has only added to a growing mystery.
According to NASA, the new measurement, which comes from data gleaned from Hubble Space Telescope, falls in the middle of a hotly contested debate between two dueling theories.
Constant - Parameter - Absolute - Scale - Size
'The Hubble constant is the cosmological parameter that sets the absolute scale, size and age of the universe; it is one of the most direct ways we have of quantifying how the universe evolves,' said University of Chicago professor Wendy Freedman.
'The discrepancy that we saw before has not gone away, but this new evidence suggests that the jury is still out on whether there is an immediate and compelling reason to believe that there is something fundamentally flawed in our current model of the universe.'
Measurements - Universe - Debate - Difference
When it comes to measurements on the universe, the debate has centered on one major difference.
While a model based on light left over from the Big Bang called Cosmic Microwave Background puts the expansion at 67 kilometers per second, other measurements using a type of star called a Cepheid as a barometer have put that rate at about 73.
Result - Scientists - Sides - Causes - Discrepancy
As a result, scientists on both sides have been searching for causes in the discrepancy, but have yet to resolve the issue.
Some have even posited that scientists may have to completely reconfigure...
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