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Absolute Temperature

The standard unit of temperature measurement T in astronomy is one Kelvin. Kelvin (or absolute temperature) scale is the temperature scale that considers the freezing point of water to be 273.15 degrees, whereas the boiling point of water is equal to 373.15 degrees. In practice, the approximate values of 273 and 373 degrees are often used. A measurement of temperature taken on the Kelvin scale is known as the absolute temperature. Zero K is known as the absolute zero on the Kelvin scale.

The ratio between the average kinetic energy of single-atom ideal gas molecules and their temperature is 1 eV = 7.74∙103 K.

This model illustrates the comparative absolute temperatures of various physical bodies. The central window pins objects such as cold interstellar clouds, planets, and astral matter against the temperatures that are generally associated with them. Switch the slides by using the scale the in lower part of the model by clicking on the desired location with your mouse.

You can also use this model to view the slides in a constant motion regime. Press "Run" button. The slides will alternate every 3 seconds in a pre-set sequence, starting with the current one. Pressing "Stop" button suspends the presentation. Pressing "Reset" button will stop the presentation completely and take you back to the firs slide.

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