The idea that some of the nebulae that are observed in the sky might be "island universes," immense collections of stars far beyond the Milky Way, was first proposed by
A) Immanuel Kant in 1755.
B) Albert Einstein in 1909.
C) Heber Curtis in 1920.
D) Lord Rosse in 1845.

Question

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Immanuel Kant was among the first to propose the concept of "island universes" in 1755, suggesting that some nebulae might be vast collections of stars outside the Milky Way.

The Idea That Some of the Nebulae That Are Observed