Physics, 08.08.2019 22:30 1hannacarson

One way to calculate the size and shape of the galaxy is to estimate the distances to faint stars just from their observed apparent brightnesses and to note the distance at which stars are no longer observable. the first astronomers to try this experiment did not know that starlight is dimmed by interstellar dust. their estimates of the size of the galaxy were much too small. explain why.

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