An observer is located at 30 degrees North latitude and wants to know the highest something with a declination of -40 degrees will ever be in their sky. What is the maximum altitude of that object? (Hint: Think about what altitude and declination are each measured relative to before starting your calculations; I also recommend sketching out a small diagram rather than trying to just do it in your head)

Applications and Investigations in Earth Science (9th Edition)
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Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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An observer is located at 30 degrees North latitude and wants to know the highest something with a declination of -40 degrees will ever be in their sky. What is the maximum altitude of that object? (Hint: Think about what altitude and declination are each measured relative to before starting your calculations; I also recommend sketching out a small diagram rather than trying to just do it in your head) 

Expert Solution
Step 1: Introduction to the terminology

Attitude- It is the angle between the star and the horizon. 

Declination- an observer at any latitude would observe that any star reaches a maximum altitude in the sky. 

Latitude = 90-star altitude + star declination 

Data given in the question- 

Latitude= 30°N 

Star declination= -40° 

Star declination is positive from celestial equator to celestial North and is taken as negative from celestial equator to celestial South. 


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