What is the hottest object in the universe?
The hottest objects in the universe are believed to be the cores of stars, particularly during their final stages of life. The core of a massive star during its supernova phase can reach temperatures of around 100 billion Kelvin (100 billion degrees Celsius, or 180 billion degrees Fahrenheit). However, even hotter conditions have been created artificially in laboratory settings.
For example, experiments at the Large Hadron Collider (LHC) have produced quark-gluon plasma, a state of matter that is believed to have existed just after the Big Bang. The quark-gluon plasma created in these experiments has reached temperatures of over 5 trillion Kelvin (5 trillion degrees Celsius, or 9 trillion degrees Fahrenheit).
However, these temperatures are still far below the theoretical maximum, the Planck temperature, at which our current understanding of physics breaks down.
The Planck temperature is approximately 1.416 x 10^32 Kelvin (1.416 x 10^32 degrees Celsius, or 2.543 x 10^32 degrees Fahrenheit). At temperatures approaching the Planck temperature, our current understanding of physics, based on general relativity and quantum mechanics, breaks down. New theories, such as quantum gravity or string theory, would be required to understand the behavior of matter and energy at these extreme temperatures.
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