Shapley: My argument won the great debate at first, I think nebulae are part of the milky way, I think nebulae are dust clouds, Worked in California, My name is Harlow, I was born in 1885, Curtis: I think nebulae are star systems, My argument was later proved right, I think nebulae are outside the milky way, I worked in Michigan and Virginia, My name is Heber, I was born in 1872,

Shapley and Curtis Great debate

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