Levell, who was a Japanese teaching assistant in a French technical school at that time, was a young man whose newborn calf was not afraid of tigers. He was appreciated by arago, director of the Paris Observatory at that time, because he published several papers about the changes of planetary orbits. Arago suggested Levell to overcome this problem. Levell began to work day and night. A year later, according to the law of universal gravitation, Le Ye Wei calculated that there must be another planet besides Uranus, and it was its gravity that made Uranus' orbit "abnormal"; And calculated the orbit of Neptune. Since the Paris Observatory didn't have a detailed star map at that time, Levell wrote to his German counterpart, asking the Berlin Observatory to aim the telescope at Aquarius at 326 degrees on the ecliptic, and you will find a new planet with brightness equivalent to 9 degrees around this point. Levell's letter traveled on the road for five days and arrived at the Berlin Observatory on September 23rd. That night, Caleb and his assistant at the Berlin Observatory couldn't wait to open the dome of the observatory. In less than half an hour, I found a little star that was not on the map not far from where Le Ye Wei said. Moreover, after the magnification of the eyepiece is increased, it appears as a small round surface. On September 24, Caleb observed it for another night and found that the little star moved a little westward. On September 25, Caleb couldn't hold back his inner joy any longer, and immediately wrote back to congratulate Le Ye Wei: "Dear Mr. Le Ye Wei, you pointed out to us that the planet in the position is real."

The news that Le Ye Wei and Gail discovered new planets quickly caused a sensation in the world. Because this is a celestial body "solved" from the equation, its scientific significance is unparalleled. It makes the solar system theory and the law of universal gravitation become real scientific theories, and it is also one of the most fascinating stories in the history of science.

In fact, there is another person who calculated the position of Neptune: Adams (18 19- 1892), a 26-year-old outstanding graduate of the Department of Mathematics at Cambridge University. Adams began to calculate new planets in 1843, and it took two years to complete the final calculations on 1845, 10 and 2 1, and satisfactory results were obtained. Adams was pleased to meet Airy, then president of the Royal Astronomical Society, with his paper. Unfortunately, Ellie is not interested in this matter. He believes that the law of gravity needs to be revised, and he doesn't believe in the existence of new planets, let alone a young man. So Ellie didn't meet Adams, she just glanced at Adams' paper. When the news of Le Ye Wei came, Airy returned to absolute being and quickly dug out Adam's report, only to find that it clearly stated, "There will be a new planet in Aquarius, whose brightness is equivalent to a 9-magnitude star ..." In addition, the orbit of the unknown planet calculated by Adams is almost the same as that calculated by Le Ye Wei. Therefore, Levi, Adams and Caleb are often listed as the discoverers of Neptune.

However, according to people's observation, the orbit calculated by Adams and Levell is far from Neptune's real orbit. If the search for Neptune is carried out a few years earlier or later, people will not be able to find it at or near their predicted location.

Neptune is known to have 13 satellites, and the largest triton is still active in geological activities. Geysers erupt liquid nitrogen, and it is also the only retrograde satellite in the solar system. Near Neptune is Triton, which is bigger than the moon and may have an atmosphere on it. Triton is much smaller, about 400 kilometers in diameter and 5.56 million kilometers away from Neptune. Interestingly, the two satellites move forward and backward, and they rotate in opposite directions around Neptune.

Neptune