23,000 asteroids near Earth
Of these, 2,100 are ‘global threats’.
In 2014, a meteorite fell at Jinju
Apophis near Earth in 2029
The star is called a star in English, but one joke is that the star itself is called a star because it burns and emits light. In celestial spheres, stars rise east, rise south, and fall west, this is called daily motion. Exercising day and night.
Like a star, it moves south and southwest along the side of the eclipse (the way the sun travels). This is called a planet. These movements follow Kepler’s third law. The law of elliptical orbit, which is slow on the aphelion and fast on the perihelion, but the region surrounded by an imaginary line connecting the planet and the sun at the same time, is similar to the law of motion of the stationary region, the square of the planet’s orbital period is the cube of the main radius. It is a consistent law
◇ Asteroid Day = The planets themselves do not burn, but reflect the light of the sun and make us look like the moon. The planets are retrograde because their orbits around the Sun are different. When the Earth passes through the planets, it is retrograde and abundant. Saturn rises from the east around 23:00, Jupiter rises at 0:50, Mars rises at 1:30 and Venus rises at 3:10. At 4:30 a.m. on the 16th, Mercury, Venus, Mars, Jupiter and Saturn are a mixture of the five planets and will be visible until the end of June. This view can be seen only when the weather is clear in the rainy season.
June 30 is asteroid day. Asteroids are small, irregular bodies that are not round, like potatoes or yams. Surrounded mainly as a belt between Mars and Jupiter, the Trojan asteroid belt is located 60 degrees ahead and behind the Sun of all the planets except Saturn. Jupiter’s Trojan belt exceeds the number of asteroids between Mars and Jupiter. It is divided into rock type, mineral type and mixed rock and mineral type.
Air jet = On June 30, 1908, around 7:17 a.m., an asteroid exploded near the Tunska River in present-day Siberia, Russia. The eruption destroyed 2,150 square kilometers of forest, the equivalent of 60 to 80 million trees. In the destroyed forest, 1,500 reindeer and fallen tree carcasses were found. Eyewitnesses at the time said: “Even though I was in a train 450 km away, the train overturned due to a strong collision with the ground and a gust of wind.”
On the morning of February 15, 2013, in Chalovinsk, Russia, an object flying from space emitted light and emitted smoke brighter than daylight, hovering for 30 seconds, and then exploded into the atmosphere. The shock wave shattered the building’s exterior walls and windows within a 100-kilometer radius, injuring 1,500 people. The size of the asteroid is approximately 10 to 20 meters.
Collision = The Bohringer Reservoir is located in the desert of Arizona, USA, which formed about 50,000 years ago. In 1891, the U.S. Geological Survey concluded that it was a crater, but geologist and miner Daniel Bohringer was convinced that it was the result of a meteorite impact. It is estimated to be around 20-45 AD.
In 2014, two meteorites crashed in Jinju and it became a topic of discussion.
Asteroid craters are rare on Earth because many of them have been destroyed by crystal movements, incense and weather. There are numerous asteroid holes on rocky parts of space like the moon.
A 1 km diameter asteroid is likely to collide with the Earth once every 500,000 years, and a 5 km diameter large collision occurs once every 10 million years. The most recent impact, with a diameter of 10 km, was the impact of the Chixulab crater on the Yucatan Peninsula in Mexico, which caused the extinction of the third Cretaceous mass 66 million years ago.
Track In 1998, the US Congress officially ordered NASA to track the orbits of asteroids with a diameter of one kilometer or more, which could collide with the Earth. The United Nations designated June 30, 2016 as International Asteroid Day, which drew the attention of the international community to asteroids that are likely to collide with Earth.
Asteroids near Earth can be divided into three types. Asteroid Aton is an asteroid whose main radius is less than 1 celestial unit. With the exception of a few celestial bodies in the discovered aten groups, the apogee position is outside 1 AU. Apollo asteroids are asteroids with a radius greater than 1 AU, but cross Earth orbit. Finally, the asteroid Amur is a long-radius asteroid in the orbit of Earth and Mars, and it can come close to the Earth, but there is no danger of collision because its periphery is outside 1 AU. There are about 23,000 asteroids near the Earth and about 2,100 asteroids threaten the Earth.
◇ Name The International Astronomical Union (IAU) announced the names of the new asteroids on June 11, 2021, including the names of six Korean astronomers. Choi Young Jun, Jung In Young Min, Yang Hong Gyo, Kim Myung Jin, Kim Yoon Young, Moon Hong Gyo. Out of 120 asteroids discovered by astronomers, Dr. Zion Young-bomb, Zhang Young-sil, who invented weather forecasting and sunshine, Hong De-Young, who advocated the heliocentric theory, Lee Won-cheol, Korea’s first science doctor, who invented the meteorological astronomer and Choi Mu-sun. लावला. , Who invented gunpowder at the end of the Goryeo dynasty, this Jun, who compiled Donguibogum, Kim Jeong-ho, who created Dedongyozido, and Seohosu, who laid the foundations of Mount Cheonmunyoksan at the end of the dynasty. Joseon. This is because the researcher has the right to name.
Asteroid 46610 Besidouse is a French reading of the asteroid B612, where the little prince lives. Also, if the asteroid 46610 is converted to a hexadecimal number, it will be B612.
Exploitation failure = Some asteroids contain a lot of minerals. The abundance of minerals in some regions of the earth is due to the influence of asteroids in the past. In “Don’t Look”, a comet about 10 km long tries to change its orbit in preparation for a collision with the Earth, but blinds it with a large amount of minerals and fails to excavate it, meaning the Earth will fail. Are destroyed.
On April 14, 2029 (Korean time), an Empire State Building-sized asteroid about 370 meters in diameter orbits a geostationary satellite about 37,000 kilometers from Earth at 6:46 a.m. The Ministry of Science and ICT planned Korea’s first asteroid research project, but the project failed due to initial feasibility studies. This is the first time in 20,000 years, but it was canceled due to budget problems.
After two asteroid discoveries, Japan brought samples to Earth. Space research is far from Japan. I recommend calling the Ministry of Science and Technology so that our investigation can go to the asteroid apophysis at Nuri.
Citizen Reporter Joe Jung J. (Astronomy Teacher)
This article was supported by a local newspaper development fund.
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