This conversion is primarily for understanding the immense scale of space. While 100,000 feet is a significant distance on Earth, it's infinitesimally small compared to the distance of even the nearest stars.

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

No, this specific conversion is very uncommon in practical astronomy because the numbers are so vastly different. Astronomers typically use light-years or parsecs for interstellar distances.

There are approximately 3.11 x 10^19 feet in one light-year, making 100,000 feet a very small fraction of a light-year.