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Author Question: Dark matter in galaxies and clusters of galaxies is purely hypothetical because we have no way of ... (Read 142 times)

saraeharris

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Dark matter in galaxies and clusters of galaxies is purely hypothetical because we have no way of detecting its presence.
 
  Indicate whether the statement is true or false

Question 2

Consider the following statement, and explain whether or not it is sensible: If you had a very fast spaceship, you could travel to the celestial sphere in about 100 years.
 
  What will be an ideal response?



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frankwu0507

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Answer to Question 1

FALSE

Answer to Question 2

This statement does not make sense because the celestial sphere is a concept and not a physical object.




saraeharris

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


aliotak

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Reply 3 on: Yesterday
Excellent

 

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