Boomerang Nebula: The Universe's Coldest Place Reveals Our Sun's Distant Future

Five thousand light-years away in the constellation Centaurus, a dying star has done what the universe itself does not: grown colder than the ambient glow left over from the Big Bang. The Boomerang Nebula, at just 1 Kelvin, achieves through violent stellar expiration what no natural process was thought capable of — undercutting the cosmic microwave background, the universe's own thermal floor. In its strange cold, astronomers find not only a puzzle about stellar death, but a quiet prophecy about the eventual fate of our own Sun.