The distance between earth and mars is 225 million km. when converted using the conversion factor 1 au = 1.5 × 108 km, the distance between the planets is . the astronomical unit (au) is a light-year.

To convert km to AU, we divide 225,000,000 km by the factor of 1.5 x 10^8 = 150,000,000 km. This gives us 225,000,000 / 150,000,000 = 1.5 AU. Therefore, the distance between Earth and Mars in AU is 1.5 AU.
The AU is not equivalent to a light-year. A light-year is equivalent to around 9.5 x 10^12 kilometers.

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