The coldest temperature ever measured and/or observed was within a controlled laboratory experiment in Germany; an experiment entitled “Time‑Domain Matter‑Wave Lens System for Atomic Clouds”. During this experiment, physicists cooled a cloud of rubidium atoms to 0.000000000038 (38 trillionths) of 1 degree above absolute zero which is -273.15 degrees Celsius, colder than the vacuum of … Continue reading The Coldest Natural and Artificial Temperature in the Universe

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