The coldest place in the Universe?

This speed is why the Boomerang is so cold, Sahai explains.
Gas gets cold as it expands, which you can feel if you place your hand over a tyre nozzle as air is being let out. And if the gas expands as fast as it does in the Boomerang, it can get really cold. The nebula also contains a lot of gas, which makes it difficult for the ambient heat from the cosmic microwave background to seep in, helping the gas remain at a low temperature. With the exception of the artificial conditions created in certain laboratories on Earth, there's no known colder place in the universe.

That's fascinating... I had no idea that there were areas in the Universe with temperatures below background. All makes sense based on the above explanation.

Thanks for sharing.