Scientists Can Finally Explain Why The Boomerang Nebula Is Colder Than Space Itself

Some 5,000 light-years from Earth, there’s a bizarre and mysterious nebula that clocks an average temperature of just 1 Kelvin (−272.15 °C or −457.87 °F), making it the coldest natural object in the known Universe. For decades, scientists have struggled to explain how this otherwise unremarkable cloud of gas maintains temperatures colder than empty space itself, but […]

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