Which characteristic is not generally true of a starburst galaxy? ...

[cookcarl]

Which characteristic is not generally true of a starburst galaxy?
 
  A) The observed features that cause us to classify it as a starburst must be only temporary phenomena in the galaxy's history.
  B) The observed features of the starburst are thought to be caused by the presence of a supermassive black hole in the galaxy's center.
  C) Supernovae occur so frequently that their effects combine to drive a galactic wind that blows material into intergalactic space.
  D) Its rate of star formation is many times higher than the rate of star formation in the Milky Way.

Question 2

The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1. How much brighter does the Sun appear than Sirius?
 
  What will be an ideal response?

[nathang24]

Answer to Question 1

B

Answer to Question 2

This is a difference of 25 magnitudes. As each 5 magnitudes is a brightness factor of 100 times, then 100 to the fifth power is 10 billion times brighter.