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 spiral nebulae were located outside the Milky Way.
D) life existed outside of Earth.

Question

Quizplus · Accepted Answer

The Great Debate of 1920 was focused on the nature and location of the spiral nebulae. Harlow Shapley argued that they were part of the Milky Way galaxy, while Heber Curtis argued that they were separate galaxies outside of the Milky Way. The debate was eventually settled in favor of Curtis' theory, which contributed to the development of the concept of the "island universe" and the modern study of extragalactic astronomy. The Big Bang theory wasn't proposed until the 20th century, and the age of the universe is constantly being revised based on new evidence. The question of whether or not life exists outside of Earth is still a topic of ongoing scientific investigation.

In the Great Debate of 1920,Curtis and Shapley Argued Over