What units of measurement the distance between a comet and the sun?

The distance between a comet and the Sun is commonly measured in astronomical units (AU), where 1 AU is the average distance from the Earth to the Sun, approximately 93 million miles or 150 million kilometers. Additionally, distances in space may also be expressed in kilometers or miles, especially for specific measurements. For very large distances, light-years or parsecs can be used, but these are less common for measuring distances within our solar system.