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Author Question: The greatest rift valley system yet found is ________ on Mars. Fill in the blank(s) with correct ... (Read 63 times)

future617RT

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on: Jul 27, 2018
The greatest rift valley system yet found is ________ on Mars.
 
  Fill in the blank(s) with correct word

Question 2

The first attempt to map the Galaxy via star counts was done by
 
  A) William Herschel in the late eighteenth century.
  B) Edwin Hubble with the new 100 Mt. Wilson telescope in the 1930s.
  C) Harlow Shapley with the RR Lyrae variables in 1920.
  D) Edward Barnard with long exposure photos about 1900.
  E) Galileo in 1612.


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lindahyatt42

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

Valles Marineris

Answer to Question 2

A


future617RT

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

Viet Thy

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Reply 3 on: Yesterday
Wow, this really help

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