ALMA returns to boomerang nebula: Companion star provides chilling power of 'coldest object in the universe'
Monday, June 5, 2017 - 12:02
in Astronomy & Space
An ancient, red giant star in the throes of a frigid death has produced the coldest known object in the cosmos—the Boomerang Nebula. How this star was able to create an environment strikingly colder than the natural background temperature of deep space has been a compelling mystery for more than two decades.