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Author Question: Dark matter in galaxies and clusters of galaxies is purely hypothetical because we have no way of ... (Read 131 times)

saraeharris

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on: Jul 27, 2018
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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Reply #1 on: Jul 27, 2018
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
YES! Correct, THANKS for helping me on my review

tkempin

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Reply 3 on: Yesterday
:D TYSM

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