Biology, 21.03.2020 21:07, tatianna341

In the early 20th Century, astronomers thought that the Milky Way Galaxy was the entire universe. In fact, they considered spiral galaxies, such as the Whirlpool Galaxy, to be spiral nebulae within the Milky Way. What could be the reason for this misconception?

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In the early 20th Century, astronomers thought that the Milky Way Galaxy was the entire universe. In...