Q
What is the coldest place in the universe?
A
Expert Answer
The Boomerang Nebula holds the record at ~1K (above absolute zero), created by rapid expansion of gas. For comparison, the CMB is 2.7K. Laboratory experiments have reached colder temperatures (picokelvins). Absolute zero (0K) is theoretically unattainable.
Key Insight
The Boomerang Nebula holds the record at ~1K (above absolute zero), created by rapid expansion of gas.
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