The Legend of the Solar System Frontier – Kuiper Belt and Oort Cloud (II)

Until 1992, two American astronomers, Jewit and Luw, who did not believe that the outer solar system was completely empty, finally discovered the first Kuiper Belt Object (KBO) – 1992 QB1. 1992 QB1 is only about 200 kilometers in diameter. galvanized steel tubing suppliers The average distance from the sun is 43 astronomical units with a revolution period of 291 years.

The discovery of 992QBl inspired astronomers who were keen to find new planets in the solar system. The Kuiper belt became a reality from the imaginary zone and became the focus of astronomical telescopes around the world. From 1992 to October 2002, more than 600 Kuiper belt objects were discovered, ranging in diameter from 50 to 1200 km, the largest of which was discovered in 2002 and is known as the Kuiper belt of Quar. The celestial body, but the diameter (1250 km) is only a little more than half of Pluto (2400 km in diameter). According to astronomers, the Kuiper belt with a diameter of more than 100 kilometers in the Kuiper Belt from 30 to 50 astronomical units may reach 100,000. If they add up to their mass, they can form a large planet that is one-tenth the mass of the Earth. People still expect a larger Kuiper belt to be captured by their telescopes.square steel tubing for sale

Expectations have not failed. On February 20 this year, planetary scientists at the American College of MT and Yale University in California discovered a new Kuiper belt object, tentatively named 2004 DW. It is calculated to be about 7 billion kilometers (50 astronomical units) from the Earth, with a diameter of 1400 to 1600 kilometers, which is hundreds of kilometers larger than the Quar’s found in late 2002, thus becoming the new Kuiper Belt Celestial Champion in the annals of history. The record of the newly formed Kuiper Belt Celestial Champion was rewritten on March 15th, less than a month later. steel coil manufacturers NASA announced that they have discovered a larger Kuiper belt object that looks more red than Mars. The new object is named “Sedna.” Sedna is about 2,000 kilometers in diameter and may be composed of ice and rock, slightly smaller than Pluto. This is the largest object found in the solar system since the discovery of Pluto in 74 years.

Sedna has a very flat and horizontal elliptical orbit. It is the most typical Kuiper belt object discovered so far. It takes about 10,500 years around the sun. When Sedna returned last time, the earth was experiencing the last ice age. And when Sedna’s next return, the face of the earth does not know what has changed! Because it is too far away from the sun (about 13 billion kilometers, 90 astronomical units), Sedna’s temperature will not be higher than -200℃. The discoverer, the California Institute of Technology astronomer Brown, pointed out that if you look at the sun on the hillside of the distant Sedna, the sun is no longer a huge gold wheel that shines on the earth, but it is very small, just a pin can cover it completely.

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