A nanometer (nm) is a unit of length equal to one billionth of a meter. It's often used to measure very small things, like atoms and molecules.

A light-year is the distance that light travels in one vacuum in one Julian year (365.25 days). It's a unit used to measure astronomical distances.

This conversion is primarily for conceptual understanding, illustrating the enormous difference in scale between the microscopic world and the vastness of space.

1,000,000,000 nanometers is equal to 0.0000 light-years, a very tiny fraction of a light-year.