The Boomerang Nebula is a beautifully symmetrical cloud of rapidly expanding gas and dust. The molecules have cooled down greatly from the time they were part of the central star, to the point of being only about one degree above 0 Kelvin, making this one of the coldest known locations in the observable universe.
Credit: Hubble Heritage Team, J. Biretta (STScI) et al., (STScI/AURA), ESA, NASA
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Yet another fine blog…. 😅 