Coldest Natural Place of the Known Universe
Boomerang Nebula or Bow Tie Nebula is defined the coldest natural place of the known universe. It is in the Centaurus constellation and 5000 light years away from the Earth. The background temperature of empty space is 2.7 K, the Boomerang Nebula is even colder than that. Its temperature is measured 1 K or −272.15 °C which is hardly above the coldest temperature possible- 0 K or absolute zero. Boomerang Nebula is a dying red giant that's spewing out a cloud of dust and gas. It expanding lot of gas outward from the star at a rate of 164 Km per second that is about 10 times faster than similar space objects. Its temperature was measured by the comparison of radiation signals of vast empty stretches of space with signals from carbon mono oxide gas particles in it.
The Boomerang Nebula was first observed by an Australian Astronomers team in 1980. In the late 90's the nebula was observed by Hubble Space Telescope and in 2013 astronomer took a closer look of the nebula's shape by using the ALMA.
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