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Author Question: When a planet retrogrades, it appears to move westward for weeks at a time. Indicate whether the ... (Read 18 times)

notis

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on: Jul 27, 2018
When a planet retrogrades, it appears to move westward for weeks at a time.
 
  Indicate whether the statement is true or false

Question 2

Which of these is the likely progenitor of a type I supernova?
 
  A) a mass-transfer binary, with the white dwarf already at 1.3 solar masses
  B) a contact binary, with the neutron star at 2.3 solar masses
  C) an evolved red giant which is just starting to make silicon in its core
  D) an evolved blue supergiant that is about to experience the helium flash
  E) a helium-neon white dwarf


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shaikhs

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

TRUE

Answer to Question 2

A


notis

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


shaikhs

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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