Red shift.
To measure the distance of stars you have to measure by light years.
redshift
Because they cannot visit stars and measure their sizes with a tape measure!
To measure wind speed you use an anemometer. These are sometimes called wind meters. Meteorologists use anemometers to help predict weather.
no you use a stopwatch to measure elapsed time.
They do not use units: they use the fact that stars are not galaxies. For example, you don't use units to measure the difference between children and countries.
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.
You can use a radar gun to measure your break speed. On a simpler level, there is a smartphone app called Break Speed, which does just that.
you use light years, and other units
To measure the speed of wind.
Anemometer.
the sun