1 light-year(ly) = 9460730472580.8 km;
1 astronomical unit(AU) = 149597870.700 km; (redefined by International Astronomical Union in 2012)
1 km = 1000 m;
1 cm = 0.01 m;
1 mm = 0.001 m;
1 μm = 10-6 m = 0.001 mm;
1 nm = 10-9 m = 0.001 μm;
1 angstrom = 10-10 m = 0.1 nm;
1 nautical mile = 1852 m;
1 mile = 1609.344 m;
1 yard = 0.9144 m;
1 foot = 0.3048 m;
1 inch = 0.0254 m;
Comments