How many astronomical unit in 1 megalight-year? The answer is 63197790926.098. We assume you are converting between astronomical unit and megalight year. You can view more details on each measurement unit: astronomical unit or megalight-year The SI base unit for length is the metre. 1 metre is equal to 6.6845871222684E-12 astronomical unit, or 1.0577248071986E-22 megalight-year. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between astronomical units and megalight years. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from megalight-year to astronomical unit, or enter any two units below:
The astronomical unit (AU or au or a.u. or sometimes ua) is a unit of length defined to be exactly equal to 149,597,870,700 metres. Historically, the astronomical unit was conceived as the average Earth-Sun distance (the average of Earth's aphelion and perihelion), before its modern redefinition.
The symbol "ua" is recommended by the Bureau International des Poids et Mesures, but in the United States and other anglophone countries the reverse usage is more common. The International Astronomical Union recommends "au" and international standard ISO 31-1 uses "AU".
One megalight-year, abbreviated "Mly", is one million light-years, or 306,601 parsecs. Megalight-years are typically used to measure distances between neighboring galaxies and galaxy clusters.
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