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Author Question: Gentle tidal interactions are probably necessary to support the formation of _______________ in a ... (Read 76 times)

sc00by25

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on: Jul 27, 2018
Gentle tidal interactions are probably necessary to support the formation of _______________ in a galaxy.
 
  Fill in the blank(s) with correct word

Question 2

Why do large reflecting telescopes, like the Keck Observatories, have segmented mirrors?
 
  What will be an ideal response?


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isabelt_18

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

spiral arms
spirals

Answer to Question 2

Segmented mirrors of large telescopes reduce the weight of the mirror, therefore reducing the weight of the rest of the telescope, making it stronger and less expensive. Also, segmented mirrors prevents sagging (and thus breakage) of one, large, heavy mirror.


sc00by25

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Reply #2 on: Jul 27, 2018
Thank you!


isabelt_18

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Reply #3 on: Jul 27, 2018
Always glad to help...


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