The Coldest Known Place In The Universe ― Boomerang Nebula

The coldest place in the Universe is the Boomerang Nebula, where the temperature is only 1 degree Kelvin (−272.15 °C; −457.87 °F) making it the coolest natural place is currently known in the Universe. Humans, however, have achieved much colder temperatures in the lab.

The Boomerang Nebula, which is an interstellar mashup of dust and ionized gases is located nearly 5,000 light-years away from Earth in the Centaurus constellation. It's also known as the Bow Tie Nebula. It was once a star much like our sun, but now it's near the end of its life, and it's sloughing away from its outer layers.

It was 1980 when Keith Taylor and Mike Scarrott first discovered the nebula with the Anglo-Australian telescope at the Siding Spring Observatory, Australia. The astronomers saw merely a slight asymmetry in the nebula's lobes due to telescopic limitations at the time, indicating a curved shape similar to a boomerang. The object gained its name from this "The Boomerang Nebula". 

In 1995, using the 15-meter Swedish ESO Submillimetre Telescope in Chile, astronomers Sahai and Nyman revealed that it was the coldest natural place in the Universe ever found. With a temperature of -272°C, it is only one degree warmer than absolute zero (the lowest limit for all temperatures). Even, it's the only object found so far that has a temperature lower than the background radiation.

According to Sahai, the Boomerang Nebula is even colder than other expanding nebulas because it throws off its mass about 100 times faster than those dying stars, or about 100 billion times faster than the mass ejected by the sun.

In 1998 The Hubble Space Telescope photographed the nebula in detail, revealing a more symmetrical hourglass shape.

Astronomers say that Boomerang Nebula is the coldest known object in the universe. It's even colder than the faint afterglow of the Big Bang, which is the temperature of space's natural background: colder than space itself.