Whose observations first established that the Sun is not at the center of the Milky Way?
Quick Answer
Harlow Shapley’s studies of globular clusters in the 1910s and 1920s showed the Milky Way’s center is far from the Sun. That helped move astronomy away from a Sun-centered galaxy model.
The Full Story
Harlow Shapley used the distribution of globular clusters to estimate the size and shape of the Milky Way. He concluded that the Galaxy’s center lies in the direction of Sagittarius, not near the Sun, and that the Sun is located far from the middle. His work in the 1910s and 1920s was crucial in establishing the Milky Way as a large, structured galaxy. It was a major shift in humanity’s view of our cosmic place.
Key Facts
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"The measurements that kicked Earth out of the center of the galaxy"
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