THE POLE STAR AND SHEPERD'S STAR

On the contrary that we could think, the pole star isn't the most luminous star and the first star to appear in the sky. It indicates only the north. In addition we can often confuse it with the star of Shepherd. This two body are very famous and prone a lot of false idea. For example we believe that the star of shepherd is a real star whereas it isn't, it's just the planet Venus.

 

The bright star is the pole star. We can see that pole star is near the earth's axis.

 

 

photography realised by Sonia GERMAIN, Anne GIRARD et Cémilia DESCHAMPS with Schmidt Cassegrain 8", f/d =6.3.

Commons and differences characteristics

 
commons characteristics
differences
SHEPHERD'S STAR

- we call them "star"

- very famous

- permit to locate himself :

pole star - geography ; shepherd's star - time;

- variable magnitude

- visibles to naked eyes.

- planet,

- variable diameter,

- movable in the sky in the ecliptic plan

- only system ( there isn't any satellite )

 

POLE STAR

- star

- motioneless,

- double system

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