How did astronomers determine where Earth is located within the Milky Way?

The Earth's place in the galaxy was determined largely by an astronomer named Harlow Shapley.  Thanks to the regular periods of these stars and their presence in globular clusters, Shapley was able to map the distances to a number of clusters.

Step-by-step explanation:

An astronomer Named Harlow Shapley was the one who announced where we are in space ( Earth ). How? with the help with stars brightness ( Absolute Magnitude ) whereas to how bright a stat appears to be ( magnitude ) they use that calculation to determine the distance from Earth. Harlow Shapley couldn't do this on his own as he needed help with another one's work named Henrietta Swan Leavitt. ( Who established that "Variable Stars" could determine the "astronomical distance " )

step-by-step explanation:

at each of the parallel lines adjacent angles are supplementary. the angles have special names identifying their positions with respect to the parallel lines and transversal. they are corresponding angles, alternate interior angles, or alternate exterior angles. an angles is congruent to its matched angle.