## Convert millimicron to light year

 millimicron light-year

How many millimicron in 1 light-year? The answer is 9.4607304725808E+24. We assume you are converting between millimicron and light year. You can view more details on each measurement unit: millimicron or light-year The SI base unit for length is the metre. 1 metre is equal to 1000000000 millimicron, or 1.0570008340246E-16 light-year. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millimicrons and light years. Type in your own numbers in the form to convert the units!

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## Definition: Millimicron

The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.

So 1 millimicron = 10-3 microns.

The definition of a micron is as follows:

a metric unit of length equal to one millionth of a meter

## Definition: Light-year

A light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 × 1012 kilometres (9.46 petametres, or about 5.88 × 1012 (nearly six trillion) miles). More specifically, a light year is defined as the distance that a photon would travel, in free space and infinitely far away from any gravitational or magnetic fields, in one Julian year (365.25 days of 86400 seconds each).

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