Meters
Meters.
With maths and light brightness.... Distance between two points...
light years
Light Years.
Light year or astronomical units
usually the space is measured in light years
you use light years, and other units
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.
Astronomers use the unit of measure "Light Years" to calculate the distance between pretty much anything in the Universe.
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light year
scientists use light-years to measure long distances in space. a light year, (abrviated ly) is the distance light can travel.