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

There are an enormous number of inches in a light-year, approximately 6.19 x 10^20 inches. This is why 100,000,000 inches is such a tiny fraction of a light-year.

This conversion is primarily for conceptual and educational purposes, to emphasize the vastness of space by contrasting it with a familiar, small unit like the inch.

This specific conversion is not common in practical scientific applications but is useful for illustrating scale differences in educational contexts.