While researching the career of astronomer Henrietta Swan Leavitt, a student took the following notes:
* Leavitt was an American astronomer who worked at the Harvard College Observatory.
* In 1912, she published her discovery of the relation between the period and luminosity of Cepheid variable stars.
* This discovery allowed astronomers to measure the distances to faraway galaxies.
The student wants to write a sentence that emphasizes the year Leavitt published her discovery of the period-luminosity relation. Complete the sentence by filling in the blank with the appropriate year from the notes.
Answer:Astronomer Henrietta Swan Leavitt published her groundbreaking discovery of the period-luminosity relation of Cepheid variables in 【1912】.
Answer
1912
The correct response is '1912' because the notes explicitly state that Henrietta Swan Leavitt published her discovery of the relation between the period and luminosity of Cepheid variables in 1912. Filling the blank with this year directly fulfills the rhetorical goal of emphasizing when the discovery was published.
Step-by-Step Solution
Key Concept
Rhetorical Synthesis: Emphasizing Specific Details
Estimated Time:45s