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Very small and very large numbers are not the sole property of cosmology, there are many cases where such numbers appear. What is hard to do is visualize the meaning of something like a million or a billion. Below I provide several examples of large and small numbers.
In the table for temperatures the values are given in degrees Kelvin; a degree Kelvin equals a degree Celsius, but zero degrees Kelvin corresponds to - 273.16 degrees Celsius. In order to change to degrees Fahrenheit you need to do the following operation:
Deg. Farenheit=1.8×Deg. Kelvin -459.
Absolute zero, the temperature at which all systems reach their lowest energy level, corresponds to zero degrees Kelvin, and -459 degrees Fahrenheit.