Measuring the universe what would be the best method for a scientist to use in order to obtain a precise measurement of star's distance from earth? triangulation method blueshift method redshift method radial method

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as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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