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THANK YOU IN ADVANCE FOR THE ANSWER

THANK YOU IN ADVANCE FOR THE ANSWER-example-1

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Follow the arrows carefully.

D ... from the star, into the telescope

C ... reflect off of the main mirror

E ... reflect off the secondary mirror;
turn sideways

B ... out through the eyepiece

A ... straight into your eye
User Robby Smet
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D => C => E => B=> A
User Axiverse
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