A light-year is a unit of astronomical distance, equal to the distance that light travels in one year in a vacuum.

Yards are a unit for measuring short distances on Earth. Astronomical distances are so vast that using yards would result in astronomically large and unmanageable numbers. Light-years are much more practical for these immense scales.

There are an immense number of yards in a light-year, approximately 5.30 x 10^20 yards, highlighting why light-years are preferred for space.

No, 50000 yards is an extremely small distance in the context of space. It converts to a tiny fraction of a light-year (0.0000 light-years), far less than the distance to even the closest stars.