On August 12, 2018, as all the year round one of meteor shower with steady flow, perseus meteor shower is annual the astronomical phenomena with significant summer vacation time. (the picture comes from Oriental IC)Perseus meteor shower (formal name Perseids) is the meteor shower that shows with pointing out for radiation near Perseus γ star, also call Perseus γ meteor shower. Came every year on July 20 around appeared on August 20, reached a climax on August 13. With quadrant meteor shower, Gemini meteor shower calls year 3 fireball rain. (the picture comes from Oriental IC)It not only the amount is much, and never pass in the absent in summertime sky almost, secure time stability every year to appear, it is the most active, most the meteor shower that often is gone to by observation, also be best to observer of blame major shooting star meteor shower, for annual first of 3 big periodic meteor shower. (the picture comes from Oriental IC)Observation Perseus meteor shower actually very simple, should seek the one place hollowness, site that kills without light only, naked eye is watched toward northeast direction and zenith can. When midnight, the radiation dot of Perseus meteor shower is located in northeastern horizon, rise before dawn to about 80 degrees tall, second half night is OK observation (the picture comes from Oriental IC)The cause of formation of Perseus meteor shower and comet are concerned, comet is You Bing piece and the sphere that Sha Shi comprises, when comet is close to the sun, comet can make because of the heating power of the sun exterior material sublimate, these sublimate material is in the future meteoroid. Day of movement is circled in comet in, experience of halfway shooting star and comet are detached, bequeath is on the orbit of comet, meteoroid is pressed as a result of sun's rays reach planetary active force, can diffuse ceaselessly, be far from each other, and limits increases gradually. (the picture comes from Oriental IC)The moving orbit of local ball and comet orbit intersect , meteoroid suffers effect of attraction of earthly the earth's core, can enter earthly aerosphere and combustion, and the blaze light that produces when combustion, be the meteor shower that people sees. The meteoroid that if distribute,goes up in comet orbit much wide word, often return to a few years of after in comet, still can see the meteor shower that the meteoroid place that arises by this comet place causes. (the picture comes from Oriental IC)