The answer depends on the scale but the SI unit is a metre.
To measure the distance of stars you have to measure by light years.
Feet
Kilometres or miles.
I think Miles
Kilometers
distance
The meter, the SI unit for distance.
Angstroms
light years
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
Miles.