Given that the Andromeda galaxy is about #163000# light years across and subtends about #4.1^@#, approximately how many light years away is it?
1 Answer
Mar 28, 2017
Approximately
Explanation:
#4.1^@ = 4.1*pi/180 ~~ 1/14# radians
So the approximate distance to Andromeda is:
#163000*14 ~~ 2300000# light years