An illustration shows trapped ytterbium atoms cooled to temperatures about 3 billion times colder than deep space

Scientists create coldest matter in the universe in a lab

A team of researchers has cooled matter to within a billionth of a degree of absolute zero, colder than even the deepest depths of space ,  far away from any stars. 

Interstellar space never gets this cold due to the fact that it is evenly filled with the cosmic microwave background (CMB), a form of radiation left over from an event that occurred shortly after the Big Bang when the universe was in its infancy. The chilled matter is even colder than the coldest known region of space, the Boomerang Nebula, located 3,000 light-years from Earth, which has a temperature of just one degree above absolute zero. 

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