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Author Question: During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit ... (Read 93 times)

serike

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on: Jul 27, 2018
During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit relied largely on rare
 
  A) total solar eclipses.
  B) transits of the inferior planets across the Sun.
  C) passages of comets close to the Earth.
  D) maximum elongations of Venus.
  E) oppositions of Mars.

Question 2

Most interstellar clouds remain stable in size because the force of gravity is opposed by ________ within the cloud.
 
  A) degeneracy pressure
  B) radiation pressure
  C) stellar winds
  D) thermal pressure


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mcomstock09

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

B

Answer to Question 2

D


serike

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


mcomstock09

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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