In which year and which comet caused the first eruption of Leonid meteor shower?

The meteor shower in Leo is called the king of meteor showers, and it happens every year 165438+ 10. For those who love astronomy, there will be a lot of Leo meteors on 1 18 this year. So, when did the Leonid meteor shower first break out from the knowledge of constellations? Which comet caused it?

Q: When did the Leonid meteor shower first break out? Answer: The Leonid meteor shower first broke out in 1833.

Q: Which comet caused the Leonid meteor shower? The reason is that there is a comet called tuttle (55p/Temple-Tuttle).

Ten unknown facts of Leonid meteor shower: Leonid meteor shower visited the moon as well as the earth. When the Leonid meteor shower visits the moon, we can also see it on the earth. Because the distance between the moon and the earth is relatively close, the Leonid meteor shower will also appear on the moon every June165438+1October. However, there is a difference between a meteor shower visiting the moon and a meteor shower visiting the earth: the moon has no atmosphere to stop the meteor shower, so these tiny comet fragments will directly fall on the surface of the moon and explode. However, the meteor shower is not much bigger than a stone and weighs only a few ounces. How can it produce brightness like a star, so that people can see it on the earth? In recent years, scientists have gradually come to the conclusion that the Leonid meteor shower flies to the earth and the moon at an extremely fast speed, exceeding 6.5438+0.6 million miles per hour, so its kinetic energy is very large, which causes all the moon dust around the meteor shower-affected area to evaporate, thus producing bright light.

Fact 2: Meteor showers are actually not space junk. For convenience, many of us regard meteor shower as space debris, but in fact, a more scientific description of meteor shower should be meteoroids. According to the definition of American Meteor Association, when a meteor shower enters the atmosphere, the light it produces is called a meteor. In other words, meteor shower is just a cosmic phenomenon, not a specific substance such as space debris.

Fact 3: Meteor showers don't fall to the ground. The huge heat generated by meteor showers makes them vaporize when they are far away from the earth's surface. Even a large meteor that can reach the size of a basketball will generally burn out and cannot fall to the ground. Of course, there are some exceptions. Very few meteors may eventually cross the net and reach the ground. Scientists point out that meteor showers are mainly composed of comets with poor toughness, so they are easy to break into small pieces or decompose. In fact, there are very few meteoroids as big as basketball, and most meteoroids are as big as pebbles. Because the meteor shower falls very fast, it will burn when it is 87 miles from the surface of the earth, where the air is still quite thin.

Fact 4: Meteor showers don't burn because of friction. Many data say that the meteor shower is very bright because it rubs against air molecules in the process of falling, but in fact, due to the rapid flight speed of the meteor shower, the air molecules are often heated up obviously under pressure, and the rising air in turn makes the meteor shower start to burn, and the temperature at that time may exceed 1650 degrees Celsius.

Fact 5: The meteor shower not only looks beautiful but also has sound. When a meteor shower streaks across the sky, it leaves a trail of ionized gas behind it. Sometimes FM broadcast signals or TV signals from far away can "intercept" this signal and convert it into sound. If you know which band to tune the radio to, you can hear the sound. It is said that this sound is similar to whistle or buzz.

Fact 6: Meteor showers are unpredictable. In any case, it is very difficult to predict the meteor shower in advance, including predicting its number and the time to reach its peak. In 200 1 year, different forecasting groups made different predictions about Leonid meteor shower, and the differences between them were even great. Although everyone agrees that the number of meteor showers will be large, there are still some differences between the final results and the predicted data, and none of the predictions are completely correct. In some areas, the number of meteor showers is more than predicted, while in others, it is less than predicted. In addition, sometimes the Leonid meteor shower lasts much longer than predicted.

Fact 7: The Leonid meteor shower was once considered as a harbinger of the end of the world. Leonid meteor shower is expected to produce a large number of meteors. The scenery is breathtaking, but think about it. 1833, people were still worried about the Leonid meteor shower and didn't know the cause of its formation, so they mistakenly thought that the end of the world was coming.

Fact 8: The formation of Leonid meteor shower is related to Comet Temple-Tuttle. Comet Temple-Tuttle was independently discovered by William Temple and Horace tuttle at the end of 1865 and the beginning of 1866 respectively, so this comet was named after them. Astronomers later discovered that this comet is closely related to the annual Leonid meteor shower. But it was not until 1965 that comet Temple-Tuttle was observed again. 1On March 4th, 997, three scientists from the University of Hawaii, Karen Mitch, Olivier Gannot and James Bauer, once again observed Temple-tuttle. It is said that this comet will return to the solar system in 20031year.

Fact 9: The best place to observe the Leonid meteor shower is in space. No one has the best conditions to observe the Leonid meteor shower like the astronauts on the International Space Station. However, only a few people are lucky enough to board the International Space Station. Even Lan Se Bass, a meteor music star, didn't get a ticket to the International Space Station. Astronauts on the International Space Station can see this landscape at the peak of the Leonid meteor shower in Europe, and a few hours later they can also see the Leonid meteor shower in the night sky in North America. However, it is worth mentioning that astronauts don't look up at meteor showers like observers on earth, but look down. Because the flying height of the International Space Station is 240 miles, which far exceeds the thick air height in the atmosphere that can make meteor showers burn in a large area. The following is the description made by astronaut Frank Coulberson when observing the Leonid meteor shower on the International Space Station in 20065438+0: "We seem to see some UFOs flying towards the earth in formation, about three or four at a time." Fortunately, Coulson knew very well that what he saw was a meteor shower. He went on to write: "Hundreds of meteors fly below us every minute. This scene is really spectacular! "

Fact 10: Leonid meteor shower is comet debris. Leonid meteor shower is the debris of comet, and a large number of meteors are stripped from the Temple-Tuttle comet every 33 years. Scientists believe that comets formed with the solar system about 4.6 billion years ago. At that time, the sun was separated from hydrogen, helium and some dust, while Comet Temple-Tuttle was generated from the remaining remnants and has been flying around the sun ever since. The short Leonid meteor shower is one of the favorite research topics for astronomers. In recent years, some astronomers began to catch meteor showers by plane in order to get close contact with them.

Related article recommendation: What does Uranus stand for in the Double Constellation Date Encyclopedia? What is the moral? How to calculate the monthly table of twelve constellations? How to correctly divide the comparison table? Which planet is farthest from the sun? How many times is Jupiter the size of the earth?

Singularity constellation network, an encyclopedia of constellation knowledge that many girls will pay attention to. Eight-character marriage, eight-character career, marriage fortune, constellation of wealth, emotional combination, seeing the other half, eight-character calculation, name speed matching, life fortune, compound opportunity, you can also consult the singularity constellation online at the bottom.