Me, I'm torn between the Smoot and the Parsec
distance
The answer depends on the scale but the SI unit is a metre.
The meter, the SI unit for distance.
light years
Angstroms
mainly meters are being used : symbol (m)
The standard measure for distance is the METRE
The unit that measures the greatest distance is a light-year, which represents the distance that light travels in one year. This unit is frequently used in astronomy to measure vast distances between celestial objects.
Kilometers are a unit of length, used to measure distance.
meter
Metre
the metre