Which constellations can you see every year?

Meteor shower is a very common phenomenon in astronomy, and there is more than one meteor group activity almost every night. There is no physical connection between meteor shower and constellation. Every meteor shower has a source, which may be a comet or an asteroid. When these small celestial bodies run in the solar system, for some reason, they will produce some tiny fragments. These fragments gradually dispersed into the orbit of small celestial bodies. When the earth passes through their orbit, debris will have a chance to break into the earth's atmosphere and form meteors. When meteors from the same source break into the earth's atmosphere, the direction and speed are similar, so on the ground, these meteors all seem to be emitted from the same direction, which is the so-called radiation point. The meteor shower whose radiation point is located in which constellation is called meteor shower. Because the orbit of meteoroids is fixed, so is the orbit of the earth, so the earth will regularly intersect with the orbits of those meteoroids every year, so there will be meteor showers in a certain constellation regularly. So how many meteor showers will appear every year? The 20 12 meteor shower calendar published by IMO, an international meteor organization, included 26 meteor showers, not including those that were not included because of small flow or bright moonlight. However, the discharge of most meteor showers is very low, and ZHR (theoretical maximum discharge under ideal conditions) usually does not exceed 20. Most of the XX meteor showers madly transmitted by various media belong to this order of magnitude. For example, the Leonid meteor shower that was madly transmitted some time ago. Although there were more than 3600 meteor storms per hour at 200 1, this year's ZHR was only about 15. However, there are several meteor showers every year, and the flow is quite large and stable. For example, the Perseid meteor shower in mid-August and the Gemini meteor shower in mid-February every year. These two meteor showers generally don't disappoint everyone.

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