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Unformatted text preview: is the distance between the Earth and the Sun, which is defined as 1 A. U. ( Astronomical Unit ). This is useful for measuring distances within the solar system. There is also the distance of a light-year- the distance light travels in one year. Parsec is another distance which is often used interchangeably with light-year. These are often used to indicate the distances between stars. For even greater distances there are kiloparsecs and kilo light-years (1 kiloparsec = 1000 parsecs, 1 kilo light-year = 1000 light-years) and for very great distances there is the mega parsec (a million parsecs) and mega light-years (a million light-years). The actual values for these distances and other common units of measure can be found in the table of constants ....
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- Fall '10