A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). It's a measure of distance, not time.

A micrometer (symbol µm) is an SI derived unit of length equal to 1×10⁻⁶ meter. It's often used for microscopic measurements.

While not a common practical conversion, it's used to illustrate the extreme difference in scale between cosmic distances and microscopic units for educational or conceptual purposes.

10 light-years is equal to 9.461e+22 micrometers.