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Author Question: The identification of spiral nebulae as large groupings of stars outside of our own galaxy was ... (Read 54 times)

jeatrice

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  • Posts: 543
on: Jul 27, 2018
The identification of spiral nebulae as large groupings of stars outside of our own galaxy was proven by ____.
 
  a. photographic plates made by Edwin Hubble showing stars and Cepheid variables
  b. the results of the Shapley-Curtis debate
 c. Immanual Kant's island universe theory
 d. William Parsons' observation and description of their spiral structure
 e. Harlow Shapley's observations of their radio spectrum

Question 2

What does a refracting telescope use to gather and focus light?
 
  a. eyepiece
 b. mirror
 c. lens
 d. photometer
 e. active optics


lorealeza77

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Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

c


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