The color of light, expressed in Kelvins (K). The sun is about 5800 Kelvins. This is called a "temperature," because the hotter fire gets, the more it changes from a warm yellow glow to white. The ...

Race for new temperature definition: Most accurate measurement yet of Boltzmann constant. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2013 / 07 / 130711084858.htm ...

The current temperature definition makes use of water's phase changes. One key threshold is the so-called triple point, 273.16 kelvins, where water ice, liquid and vapor can coexist.