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This article comes from the official account of Wechat: SF Chinese (ID:kexuejiaodian), author: SF

The Lyra meteor shower has the number of daily active users from April 16 to 25 each year, and this year is expected to reach its peak at night from April 22 to 23. Under ideal observation conditions, 18 meteors can be observed per hour.

/ photos by Peter Lawrence (Pete Lawrence)

Editor | Liu Jiayu

How is the meteor shower formed? In meteor shower observations, the considerable number of meteors seen per hour is called zenith flow. When the earth orbits the sun, it occasionally passes through the debris left by comets or asteroids, which form meteors, enter the atmosphere, and form meteor showers. In general, the density of a meteor shower is thin, but the closer it is to its parent comet, the denser it is. Meteors evaporate as they enter the Earth's atmosphere, leaving fragments of glowing material behind to form what we see as meteors.

Debris left by comets or asteroids orbits the sun in parallel orbits. When meteor showers enter the atmosphere, from our point of view, they seem to originate from a point in the sky, which is called a radiation point. The zenith flow of a meteor shower is measured by the best condition in which the sky is cloudless and the radiation point is at the zenith. If the observation conditions are not optimal, the visual rate per hour will be reduced, and the actual number of meteors observed will be less than the zenith flow.

Note for observing the Lyra meteor shower over time, the radiation point will slowly drift between the background stars, and the meteor shower will be closest to the radiation point at its peak. The radiant point of the Lyra meteor shower is located in the constellation Alpha (Vega) between the Lyra constellation and the constellation Perseus. As night falls, Vega rises from the lower part of the northeast horizon and reaches the zenith before dawn.

First of all, to get the best view, find a dark, open area away from the artificial light source. Then it takes 20 minutes for the eyes to fully adapt. Second, don't stare at the radiation point all the time. Most meteors can only be seen at a certain distance from the radiation point. April 22, 2023 is the third day of the third month of the lunar calendar, and the moon phase is "Shange Mei Moon", which means that the moon has little influence on the observation of the Lyra meteor shower, which is very favorable for observing the maximum period of the Lyra meteor shower. Finally, naked eye viewing is recommended because the field of view of the telescope is limited, which will affect the observation effect.

References:

Https://www.sciencefocus.com/space/lyrid-meteor-shower-april-2023/

Https://www.sciencefocus.com/space/quadrantid-meteor-shower-2023/

Https://www.sciencefocus.com/space/when-is-the-next-meteor-shower-in-the-uk/

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