In the Great Debate of 1920, Curtis and Shapley argued over whether or not
A) the Big Bang occurred.
B) the age of the universe was 14 billion years.
C) the universe was contracting.
D) life existed outside Earth.
E) the spiral nebulae were located outside the Milky Way.

Question

Quizplus · Accepted Answer

The Great Debate between Curtis and Shapley was about the nature of spiral nebulae and whether they were distant galaxies outside the Milky Way or part of it. Curtis argued they were separate galaxies, while Shapley believed they were within the Milky Way.

In the Great Debate of 1920, Curtis and Shapley Argued