Convert femtometer to light year
Selected category: length.
Definition and details for femtometer:
Femtometer (fm) is a metric unit of distance equal to one quadrillionth of a meter (10-15 m).
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.