Astronomy 106 Quiz 16

 

 

 

  1. According to Herschel, what shape does the galaxy have?  How did he determine this?

 

 

 

 

 

 

 

 

 

  1. Who finally measured the parallax of a star?  What star was this?  Why did he select that star to measure?  When was this measurement made?

 

 

 

 

 

 

 

 

  1. Suppose you are asked, “Which is brighter, the moon or a 100 watt light bulb”? Explain your answer, being sure to specify what you mean by brightness and under what conditions your answer(s) is (are) valid.