Herschel'2 48 inch telescope

Herschel, Kapteyn, and the Milky Way


Herschel (1785) and later Kapteyn (1922) counted stars in different directions to determine the shape of the Milky Way galaxy and our position in the Milky Way. To understand how star counting works, consider

What is the meaning of this? Are we near the center of the Milky Way galaxy?

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