Me, I'm torn between the Smoot and the Parsec
distance
The meter, the SI unit for distance.
The answer depends on the scale but the SI unit is a metre.
Angstroms
light years
The SI unit used to measure length or distance is the meter (m).
The unit for distance is typically measured in meters (m) or kilometers (km).
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