Astronomers typically measure distances in parsecs. One parsec is the distance of a hypothetical star having a parallax of 1 second of arc; it's about 3.2 light years.
Usually such distances are measured either in light-years, or in parsecs.
Light years
parsecs or light years
by the property of reflection or electromagnetic waves
Stellar distances, like the distances of stars and galaxies from Earth
because the stars are very far away so the astronomers use light years
That is one of the things scientists use to help them measure a stars distance but it isn't just based on the color.
preallax
Distances to stars are mainly measured in PC (Parsecs). Light years are also used because the distances covered are so great. For example. Proxima Centauri our nearest neighbourhood star is: Light years: 4.23 Parsecs(PC): 1.3009. If we used miles then the distance would be: 24,866,054,200,000 or kilometers 40,018,035,200,000 Which one is the easiest to remember and that is your answer
because the stars are very far away so the astronomers use light years
they are measured in AU
Long distances are measured in AU in Eve Online. For short distances, it is measured in KM.