5,000,000 nanometers is equal to 0.0000 light-years. This is an extremely small fraction of a light-year.

The result is very small because a nanometer is an incredibly tiny unit of measurement (one billionth of a meter), while a light-year is an enormous unit used for cosmic distances.

Nanometers are crucial for building the microscopic components of spacecraft and scientific instruments used in space, but not for measuring astronomical distances.

A light-year is used to measure the vast distances between stars and galaxies.