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Author Question: There are three classes of asteroids, based on their surface reflectivities. Name them, and describe ... (Read 37 times)

Deast7027

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on: Jul 27, 2018
There are three classes of asteroids, based on their surface reflectivities. Name them, and describe their composition in terms of the differentiation process.
 
  What will be an ideal response?

Question 2

How did Ptolemy explain the retrograde motion of Mars?
 
  What will be an ideal response?


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jrpg123456

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

Type M are metallic in appearance, probably fragments of the metal rich core of a broken up parent body. Type S are reddish in color with stony composition, typical of mantle material. Type C are very dark with carbon rich crusts that were never very heated.

Answer to Question 2

Mars will retrograde on the inner portion of its epicycle, when it is closest to us and its motion on the epicycle is more obvious than its motion along its deferent.


Deast7027

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


jrpg123456

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


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