A light-year is the distance light travels in a vacuum in one Julian year, which is approximately 9.46 trillion kilometers or 5.88 trillion miles.

Half a light-year is equal to 15,520,013,123,359,580 feet.

While light-years are standard for interstellar distances, converting to feet can help some people visualize or relate to these enormous scales in a more familiar unit, albeit a very large one.

No, this specific conversion is primarily used in astronomy, astrophysics, and science education due to the immense scales involved.