We use, in many remarkable ways, the [Spectrophic] Light obtained by telescopes.
To measure the distance of stars you have to measure by light years.
Because they cannot visit stars and measure their sizes with a tape measure!
Answer #1:no=================Answer #2:Yes.Another answer: The primary use of triangulation may not be to measure the distance of stars, but the method which is used to measure the distance of close stars is primarily triangulation.
Magnitude.
They measure them in light-years.
light years
You can measure it by using absolute magnitude.
The sun, the stars.
The appliance of science
Distance.
Red shift.
It depends on what you want to measure: their numbers, distance, mass, temperature, ...