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Angular size vs. Steradian

 
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Jun7-12, 02:21 PM   #1
 

Angular size vs. Steradian

When we measure the angle that certain object subtends in the night sky,
why do we commonly use angular size instead of steradian?
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Jun7-12, 04:17 PM   #2
 
Recognitions:
Science Advisor Science Advisor
If the object is circular, it simplifies things.
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