Fortune Telling Collection - Horoscope - Primary school science questions:
Primary school science questions:
Seven famous meteor showers
1. Leonid meteor shower Leonid meteor shower appears around 165438+ 10/0 to 2 1 every year. Generally speaking, the number of meteors is about 10 to 15 per hour, but the Leonid meteor shower has a peak every 33 to 34 years, and the number of meteors can exceed several thousand per hour. This phenomenon is related to the period of Comet templeton Tuttle. When a meteor shower occurs, it seems that the meteor will shoot from a specific point in the sky, which is called the "radiant point", named after the radiant point of the Leonid meteor shower is located in Leo. 2. Gemini meteor shower Gemini meteor shower appears from 13 to 14 every year, and the maximum hourly flow can reach 120, and the maximum flow lasts for a long time. Gemini meteor shower originated from 1983 TB asteroid and was discovered by IRAS satellite in 1983. Scientists judged that this may be the remains of a "burned" comet. Gemini meteor shower radiation point is located in Gemini, which is a famous meteor shower. 3. Perseid meteor shower Perseid meteor shower appears regularly from July 17 to August 24 every year. It is not only rich, but also almost never absent from the summer sky. It is the most suitable meteor shower for non-professional meteor observers, ranking first among the three periodic meteor showers in the whole year. Comet Swift-Tuttle is the mother of Perseid meteor shower. 1992 around the perihelion of the comet, the Perseid meteor shower shone brilliantly, and the number of meteors reached more than 400 per hour. 4. Orion meteor shower There are two kinds of Orion meteor shower, and the meteor shower with radiation point near Betelgeuse usually appears around 65438+1October 20 every year; The meteor shower with radiation point near ν occurred from June 65438+1October 15 to June 65438+1October 30, and the maximum day was June 65438+1October 2 1 day. We often say that the Orion meteor shower is the latter, which is caused by the famous Halley's comet. Halley's comet will return to the core of the solar system every 76 years, scattering debris in the orbit of the comet. 5. Taurus meteor shower (southern Taurus meteor shower, northern Taurus meteor shower) The appearance time of Taurus meteor shower is from June 25, 65438 to165438+1October 8, which is the maximum day. Debris in the orbit of Comet Enke forms a meteor shower. On the biggest day, five meteors can be observed flying by every hour on average. 6. Draco meteor shower The Draco meteor shower occurs from June 6th to June 8th 10 every year, and the maximum day is June 8th 10. This meteor shower is one of the three periodic meteor showers throughout the year, with a maximum hourly flow of 400. Comet Giacobini-Sinner is the origin of the Draco meteor shower. 7. Lyra meteor shower Lyra meteor shower usually appears from April 19 to 23 every year, and the 22 nd is usually the maximum day. This meteor shower is the earliest recorded meteor shower in China, and its outbreak in 687 BC is vividly recorded in the ancient book Spring and Autumn Annals. The orbital debris of comet 186 1 I formed the Lyra meteor shower, which, as one of the three periodic meteor showers in the whole year, also occupies an extremely important position in astronomy.
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