3.7842921890323e+28 nanometers equals 4,000 lightyears.
Convert 3.7842921890323e+28 nanometers into meters, kilometers, decimeters, centimeters, milimeters, micrometers, picometers, inches, feet, yards, miles, hands, astronomical units, parsecs, etc...
Convert 4000 lightyears into meters, kilometers, decimeters, centimeters, milimeters, micrometers, picometers, inches, feet, yards, miles, hands, astronomical units, parsecs, etc...