What are the basic steps to observe stars with astronomical telescopes?

When observing the starry sky with an astronomical telescope, the following steps should be followed in turn.

(1) After finding the target in the viewfinder, place the target star in the center of the field of view;

(2) aim at the target star with the star finder, and search in the star finder with the adjusting handle;

(3) After aiming at the target star in the primary mirror, adjust the focal length to make the image of the target star clear;

(4) Use the adjusting handle to find the target star in the main mirror.

(5) Adjust the focal length of sunglasses to make the image in the main mirror clear;

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