Why does a meteor shower, uniformly stretched along its orbit, usually meet with the Earth only once a year?

Because only those streams that move almost exactly in the plane of the ecliptic can have two meetings a year, and there are almost no such exceptional streams. Another condition for two encounters is also abruptly fulfilled – the perihelion distance from the node should be 90 °.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.