Question

before invention of the compass,sailors used to starsto find direction.

Answer 1

Because stars also had definite position of its orgin and it does not change its position.Ф

Answer 2

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Here's the answer:-
Sailors used to find their direction by stars because it was assured that stars always had constant position (i.e. they never changed their position). So the stars seemed to them as a direstion-teller. During their voyages in sea, there were nothing except stars which will show them exact direction so they took the help of star.
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