A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days), which is approximately 9.46 trillion kilometers or 5.88 trillion miles.

Because a light-year is an immense distance (nearly 6 trillion miles), 1000 miles is minuscule in comparison, resulting in a value very close to zero.

This conversion is primarily used in astronomy and space science to express the vast distances between celestial objects in a more manageable and understandable unit.

1000 miles is equivalent to approximately 0.0000 light-years. The exact value is 1.697 x 10^-13 light-years, which rounds down significantly.