Will an asteroid collide with Earth?

Starry Sky Story directed by Zhao Zhengzhe (5) June 30, Asteroid Day

23,000 asteroids near Earth
Of these, 2,100 are “global threats”.
Jinju meteorite fell in 2014
Apophis approaching Earth in 2029

A star is called star in English, but there is a joke that a star is called star because it burns and glows by itself. In the celestial sphere, the stars rise in the east, rise in the south, and set in the west, which is called the movement of day and night. It’s a day and night workout.

Like a star, it moves south and southwest along the ecliptic (the path the sun travels), stops suddenly, returns (backwards), returns to where it was going (rises), and then moves forward slowly and rapidly. This is called a planet. These motions obey Kepler’s third law. The law of elliptical orbits, that aphelion is slow, perihelion is fast, but the area swept by an imaginary line connecting the planet and the sun at the same time, is always the same as the law of velocity for the constant area, where the square of the orbital period of a planet is the cube of the principal radius.The law of harmony corresponds to

◇ Asteroid Day = Planets do not burn on their own, but reflect sunlight and appear to us like the moon. Planets retrograde because their orbits around the sun are different. As Earth passes planets in alien orbits, it is retrograde and prolific. Saturn rises from the east around 23:00, Jupiter at 0:50, Mars at 1:30, and Venus at 3:10. At 4:30 a.m. on the 16th, a mixture of the five planets Mercury, Venus, Mars, Jupiter, and Saturn appeared, which can be seen until the end of June. During the rainy season, the weather can only be seen when the weather is clear.

June 30 is Asteroid Day. Small, irregular objects, such as potatoes or sweet potatoes that are not spherical, are called asteroids. The Trojan asteroid belt mainly surrounds a belt between Mars and Jupiter, located 60 degrees before and after the sun on all planets except Saturn. Jupiter’s Trojan Belt is more numerous than the number of asteroids between Mars and Jupiter. Divided into rock type, mineral type and mixed rock type.

▲ Asteroids 243, 433 Eros, 253 Matilda, clockwise from the upper left corner.Citizen reporter Cho Jung-jae

◇ Jet = On June 30, 1908, at around 7:17 a.m., an asteroid exploded in mid-air near the Tonska River in what is now Siberia, Russia. The explosion destroyed 2,150 square kilometers of forest, the equivalent of 600 to 80 million trees. In the devastated forest, the carcasses of 1,500 reindeer and fallen trees were found. Witnesses said at the time: “Although I was on the train 450km away, the train overturned due to the rumble of the ground and a gust of wind.”

On the morning of February 15, 2013, over Chalovensk, Russia, an object flying in from space released light and smoke brighter than daytime, hovered for 30 seconds, and then exploded into the atmosphere. The shock wave destroyed the facades and windows of buildings within a 100-kilometer radius, injuring 1,500 people. The size of the asteroid is estimated to be about 10 to 20 meters.

◇ collision = In the Arizona desert, there is the Boehringer Crater formed about 50,000 years ago. In 1891, the U.S. Geological Survey concluded that it was a crater, but geologist and miner Daniel Boehringer was convinced it was the result of a meteorite impact. Estimated around AD 20-45.

In 2014, two meteorites fell into Jinju and became a hot topic of discussion.

Asteroid craters are rare on Earth because many of them have been lost due to crustal movement, erosion and weathering. There are many asteroid craters on rocky bodies in space, such as the moon.

An asteroid 1 km in diameter collides with Earth with a probability of once every 500,000 years, while a sizable collision with a diameter of 5 km occurs every 10 million years. The most recent impact, 10 kilometers in diameter, was that of the Chicxulub crater in Mexico’s Yucatan Peninsula, which caused the third Cretaceous mass extinction 66 million years ago.

▲ The impact of an asteroid exploding over Tonska. Trees are lying.Citizen reporter Cho Jung-jae

◇ Track = In 1998, the U.S. Congress officially began its mission to prevent the threat of asteroid collisions, ordering NASA to track the orbits of asteroids a kilometer or more in diameter that could collide with Earth. The United Nations has designated June 30 as International Asteroid Day 2016 to draw international attention to an asteroid that could collide with Earth.

Near-Earth asteroids can be divided into three categories. Asteroid Aton is an asteroid with a primary radius of less than 1 AU. Except for a few discovered objects in the Aten cluster, its apogee is 1 AU away. Apollo asteroids are asteroids with a radius greater than 1 AU but crossing the Earth’s orbit. Finally, asteroid Amur is the longer-radius asteroid between the orbits of Earth and Mars that can approach Earth without a collision risk because its perihelion is 1 AU away. About 23,000 asteroids are close to Earth, and about 2,100 asteroids threaten Earth.

◇ Name = The International Astronomical Union (IAU) announced the name of the new asteroid on June 11, 2021, including the names of astronomers, including six South Koreans. Choi Young Joon, Jung In Young Min, Yang Hongqiao, Kim Myung Jin, Kim Yoon Young, Moon Hongqiao. Among the 120 asteroids discovered by Dr. Astronomer. Jeon Young-fan, Jang Young-sil who invented the weather forecast and sundial, Hong Dae-young who advocated the heliocentric theory, Lee Won-chul, Korea’s first doctor of science who created Ar meteorological astronomers, Choi Moo-sun who invented gunpowder at the end of Goryeo, Ho who created Dongyi Baojian Jun, Kim Jong-ho, who created Datong about authentic, and West Lake who laid the foundation for Tianyueshan in the late period. This is because the discoverer has the right to be named.

Asteroid 46610 Besidouse is the French word for asteroid B612, inhabited by the Little Prince. Also, if you convert asteroid 46610 to hexadecimal, it becomes B612.

development failed = Some asteroids contain large amounts of minerals. The abundance of minerals in some parts of Earth is due to past asteroid impacts. In “Don’t Look”, a comet about 10 kilometers long tries to change its orbit and prepare to collide with the earth, but is blinded by a large amount of minerals and fails to mine, which means that the earth will fail. was destroyed.

At 6:46 a.m. on April 14, 2029 (Korean time), an asteroid the size of the Empire State Building and about 370 meters in diameter passed through a geostationary satellite orbit about 37,000 kilometers from Earth. The Ministry of Science and ICT planned to conduct the first asteroid exploration project in South Korea, but the project failed after it failed to pass a preliminary feasibility study. For the first time in 20,000 years, it was cancelled due to budgetary concerns.

After two explorations of the asteroid, Japan brought the samples to Earth. Space exploration is far from Japan. I suggest calling the Ministry of Science and Technology so that our probe can travel to the asteroid Apophis on Nouri.

Citizen reporter Jo Jung Jae (astronomy teacher)

This article was supported by the Local Newspaper Development Fund.

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