A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). It's approximately 9.46 trillion kilometers.

Kilometers are too small a unit to practically measure the immense distances between stars and galaxies. Light-years provide a more manageable scale.

50,000 kilometers is an extremely small fraction of a light-year, equal to 0.0000 light-years when rounded to this precision. This distance is tiny on a cosmic scale.

Yes, you can convert kilometers to light-years by dividing the distance in kilometers by the number of kilometers in one light-year (approximately 9.46 trillion km).