The Perseid meteor shower in Xi 'an, Shaanxi Province, in August 12 has good directionality.

Watching meteor shower needs to confirm the date of its occurrence and find the constellation in the airspace. Perseid meteor shower is emitted from the area where Perseid is located. Look up at the sky and look for the black area around this constellation.

To find Perseus, you must first find Cassiopeia. On a sunny night in autumn, shortly after sunset, looking north, you will soon see a W-shape (in some cases, an M-shape) with a width about the width of the palm of your hand. Cassiopeia rises in the northeast at sunset, reaches due north at midnight and then sets in the northwest. Once you know the shape of Cassiopeia, you can use it as a reference to find nearby Perseus. Poerxiusi always goes up and down with Cassiopeia every night. Poerxiusi is not very clever. You'd better observe the moon on a clear night without it. Circle it in red from the middle of Cassiopeia's W-shaped forehead, pass through its second star, and extend this line to the width of Cassiopeia. Then you will find a line with three stars. You found Poerxiusi.

(Source see watermark)

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