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Author Question: What is the major observational difference between a Seyfert galaxy and a normal spiral galaxy? ... (Read 51 times)

kwoodring

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on: Jul 27, 2018
What is the major observational difference between a Seyfert galaxy and a normal spiral galaxy?
 
  a. Normal spiral galaxies usually have shorter spiral arms.
  b. Normal spiral galaxies never contain a supermassive black hole at their center.
  c. The central region of a Seyfert galaxy is much brighter.
  d. Seyfert galaxies don't contain any star formation.

Question 2

A type II supernova
 
  a. occurs when a white dwarf's mass exceeds the Chandrasekhar limit.
  b. is the result of helium flash.
  c. is characterized by a spectrum that shows hydrogen lines.
  d. occurs when the iron core of a massive star collapses.
  e. is characterized by a spectrum that shows hydrogen lines and occurs when the iron core of a massive star collapses.


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jessofishing

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

c

Answer to Question 2

e


kwoodring

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

hollysheppard095

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Reply 3 on: Yesterday
Excellent

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