A light-year is an enormous distance (nearly 6 trillion miles). 50,000 miles is a very small fraction of that vast cosmic scale, hence the result is close to zero.

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 approximately 5,878,625,000,000 miles (nearly 6 trillion miles) in one light-year.

While the conversion itself shows how small 50,000 miles is astronomically, it helps in understanding the immense distances spacecraft would need to cover to reach other stars, which are measured in light-years.