Leisure little landlord

Seeing this, Jiahao shook his head helplessly, and said, "No, do you want me to introduce you one by one? Look there, and look at the direction of my fingers."

Orion, one of the equatorial belt constellations.Located between Gemini, Monoceros, Canis Major, Taurus, Lepus, Eridanus and Canis Minor, its northern part is immersed in the Milky Way.The main body of the constellation is composed of 4 bright stars such as Betelgeuse and Betelgeuse to form a large quadrilateral.The best month for observation is January.The Herschel Space Observatory has discovered the chemical fingerprint of potentially living organic matter in the Orion Nebula.

Orion is the most magnificent constellation in the whole day and one of the constellations in the equatorial belt.

Located on the celestial equator, it can be seen from most of the earth, specifically between the constellations of Gemini, Monoceros, Canis Major, Taurus, Lepus, Eridanus and Canis Minor, and its northern part is immersed in the Milky Way.The main body of the constellation is composed of 4 bright stars such as Betelgeuse and Betelgeuse to form a large quadrilateral.There are 3 bright stars arranged in a straight line in the center of the quadrilateral, which are imagined as a belt tied to the hunter's waist. In addition, under these 3 stars, there are 3 small stars, which are swords hung on the belt.The whole image is like a hunter standing valiantly, with head held high and chest high, very spectacular, and has been attracting people's attention since ancient times.The constellation represents the hunter, with two dogs (Canis Major and Canis Minor) at his feet.As the Earth spins, Orion chases the Pleiades star cluster across the sky.There are many bright stars in Orion, but the most famous feature is the huge nebula m42 on Orion's sword, which is located in the south of Orion's belt lined up by three stars.

Jiahao paused and said, "Do you think he looks like a hunter holding a sword? Does he look like that?"

"Like, like, it's really similar." Everyone looked at Orion in unison and said.

Jiahao then said: "There is one more amazing thing. You have seen the three stars around Orion's waist. It is a little unclear whether it is an individual visitor or four. Your reporter is currently in his position. When he turned around After turning to a position in the middle, it will be the time of the Chinese New Year."

Again, after Jiahao finished speaking, there was a burst of admiration from everyone, and Jiahao suddenly felt that he was much taller.

"Jiahao, Jiahao, is that the Big Dipper? Look, it's seven stars." Wanyu said, pulling Jiahao's arm.

Jiahao took a look and said: "That's right, you know the Big Dipper. It's true. Moreover, the Big Dipper plays an important role and can help us identify the direction."

The Big Dipper is made up of seven bright stars in the constellation Ursa Major, arranged in a dipper (or spoon) shape in the northern sky.It is often regarded as an important sign to indicate the direction and understand the constellation.Because these seven stars are easier to identify by stargazers, they become an obvious and important group of stars.

Ursa Major is one of the circumpolar constellations.In the south of Draco.Between Canes and Lynx.There are 6 stars with visual magnitude brighter than 151th magnitude in the constellation.Among them, there are 4 stars brighter than 24th magnitude.The stars of Ursa Major are distributed in the image of a big bear.For observers at mid-latitudes in the northern hemisphere, Ursa Major is visible all year round, but the full constellation must be observed in spring.

In China, people imagine these stars in the Ursa Major star map as the image of a big bear.At different latitudes on the earth, the constellations that can be seen are different.In areas above 40° north latitude, that is, the places north of Beijing and Greece, you can see Ursa Major all year round.but.In spring, Ursa Major is high in the northern sky, which is the best time of the four seasons to see it.

At this time, Jiahao sighed and said, "Are you guys going to wait to watch the meteor shower or exhaust me to death? Why are there so many questions?"

Everyone laughed and Wang Tao said, "Look. If you don't tell me how we know so many things about astronomy, especially since the solar system is so big, I am also very yearning for the solar system.

Jiahao also sighed and said: "The solar system is indeed very big. The solar system and the Milky Way form a huge universe. This is really amazing."

Wanyu then asked: "Jiahao, what else do you know? You, I found that I admire you more and more. Why do you know everything? Why didn't I find out before?"

Jiahao was speechless at once, so he looked at his mobile phone and there was still a little time before the ten o'clock said on the news, but they were chatting, and now the time was around nine to ten o'clock.

Jiahao smiled and said, "I'm looking forward to seeing the meteor shower in 10 minutes. Actually, I don't know anything. I like to explore and study. I feel that there are many mysteries about the Milky Way and the solar system. Stuff that fascinates me and obsesses me."

The solar system is centered on the sun and a collection of all celestial bodies bound by the sun's gravity: 8 planets, at least 165 known satellites, 5 identified dwarf planets and hundreds of millions of small solar system bodies.These small bodies include asteroids, Kuiper belt objects, comets and interstellar dust.According to the distance from the sun, the planets in the solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Six of the eight planets are surrounded by natural satellites, and the planets in the outer solar system are also surrounded by planetary rings composed of dust and many small particles.

The solar system is a celestial system composed of the sun, planets and their satellites, asteroids, comets, meteors and interplanetary matter. The sun is the center of the solar system.In the huge solar system family, the mass of the sun accounts for 99.8% of the total mass of the solar system, and the proportion of the eight planets and tens of thousands of asteroids is negligible.They have been revolving around the sun along their own orbits for eternity. At the same time, the sun generously and selflessly contributes its own light and heat, warming every member of the solar system, and impelling them to continuously develop and evolve.In this family, the closest planet to the Sun is Mercury, followed outwardly by Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

The Milky Way is a huge, disk-shaped system composed of stars and galactic matter, and the sun is a member of the system.The Milky Way is formed by the light of many stars in the Milky Way, an irregularly shaped band of light surrounding the night sky.This belt of stars lies roughly in the plane of the galactic disk.The Milky Way is one of billions of galaxies that make up the universe.It hosts tens of billions of stars and a considerable amount of interstellar gas and dust.The Milky Way is a typical class of spiral galaxies in the galaxy type.Its core is surrounded by a large central nuclear bulge with spiral arms wrapped around it.These curved arms give the Milky Way the appearance of a giant wheel.The arms are evenly sunk in the silver dish.

The galactic disk is the main component of the Milky Way, about 70000 light-years in diameter.The silver core is shielded by interstellar dust particles, which absorb the visible and ultraviolet light emitted by the silver core.Therefore, the Milky Way is a cosmic celestial body closely related to human beings.

The time is getting closer and closer to the time when the meteor shower is coming, Jiahao looked at his phone and found that there are less than 7 minutes left, Jiahao said to everyone: "There will be a meteor shower in a few minutes, you can pay attention, a hundred years A once-in-a-lifetime historic astronomical landscape is about to unfold."

"Jiahao, Jiahao, don't you think there will be comets tonight, right?" Wanyu asked.

Jiahao nodded and said: "Yes, the news said that it is extremely possible to see the broom star, which is a comet."

Comets, commonly known as broom stars, are small solar system bodies made of ice.When it gets close enough to the Sun, it exhibits a coma (a thin, obscuring temporary atmosphere) and sometimes a comet tail.These phenomena are caused by the combined action of solar radiation and solar wind on the comet nucleus.In the book "A Brief Introduction to Astronomy", it is written: "A comet is a strange star with a head and a tail. It is commonly known as the broom star because of its shape." People often attribute wars, plagues and other disasters to the appearance of comets , but this has no scientific basis.As of January 2011, there are 1 known comets, of which about 4185 are Cruz comets and about 1500 short-period comets, and this number is still increasing steadily.

Scientists estimate that comets, which typically come within a few astronomical units of the sun, will disintegrate within a few thousand years.In 1066 AD, on the eve of the Norman invasion of England, it coincided with the return of Halley's Comet.At that time, people looked at this strange celestial body with a long tail in the night sky with mixed feelings, thinking that it was a warning and herald of war given by God.Later, when the Normans conquered England, the wife of the Norman commander embroidered the scene of the return of Halley's Comet on a tapestry to commemorate it.Chinese folk derogate comets as "broom stars" and "catastrophes".There are many things in Chinese and foreign history that link the appearance of comets with human wars, famines, floods, plagues and other disasters.Comets are small cloud-shaped celestial bodies with small masses that orbit the sun in prolate orbits (very few in near-circular orbits).

Some comets have more spectacular endings - either falling into the sun, or shattering into another planet or celestial body.In the early days of the solar system, collisions between comets and planets or moons were common: Earth's moons, for example, have many impact craters, some of which may have been caused by comets.The most recent comet-planet collision occurred in July 1994, when the smashed Comet Shoemaker-Levy 7 collided with Jupiter.

In the early stages, many comets and asteroids collided and entered the earth.Many scientists believe that comet bombardment brought so much water to the young Earth (40 billion years ago) that it formed a large part, if not all, of the oceans that now fill the planet.But other researchers have questioned this theory.The detection of some organic molecules on comets has led some to theorize that comets or meteorites may have brought precursors to life on Earth -- or even life itself.There are still many comets that are near-Earth comets, but the probability of an impact between the Earth and an asteroid is still higher than that of a comet.

It is suspected that cometary impacts, on long-term scales, could also deliver large amounts of water to Earth's moons, so there may be some lunar ice left over.

Time flies, and there is less than 1 minute left, so Jiahao said to everyone: "The meteor shower is coming, everyone is ready to wait and see, haha, the once-in-a-century moment is coming." (To be continued...)