Convert span to light year
Selected category: length.
Definition and details for span:
Span is a traditional unit of length equal to 9 inches or 22.86 mm. A span was defined as the length of the span of a man's hand with fingers stretched out as far as possible. The name comes from the old English word "spann".
Definition and details for light year:
Light year (ly) is a unit of distance used by astronomers. One light year is defined from the International Astronomical Union as the distance that light travels in one Julian year (365.25 days) through a vacuum. The defined light speed is c = 299,792,458 m/sec. So one light year equals exactly 9 460 730 472 580 800 meters.