Talking about transit phenomenon

? Sunspot is a phenomenon that appears on the sun, and another phenomenon related to the sun is transit. Transit is a phenomenon that celestial bodies or artificial celestial bodies pass through the disk of the sun to block the sun. The solar eclipse is an obvious transit, but it is called "solar eclipse", not regarded as a transit, because the distance to the moon is close to the earth and covers most areas of the sun.

? Mercury and Venus run between the earth and the sun, so we can see these two planets passing through the surface of the sun on the earth. Because it is far away from the earth, when Mercury and Venus pass through the surface of the sun, the earth only sees a small black spot like a sunspot on the surface of the sun, which is the transit.

? Mercury and transit of venus appear much less frequently than solar eclipses. Mercury transits every 100 years 13 times, and the next transit will occur in 65438+February 2032; Transit of venus is very regular, with an interval of 8 years, 12 1.5 years, 8 years, 105.5 years, arranged in turn. In 2004, transit of venus transited the sun again on 20 12 eight years later. In the future, transit of venus will be seen again in 105.5 years, that is, in 2 1 17 years. 20 12 sunny in transit of venus. I was lucky enough to see this phenomenon and took photos as a souvenir.

? And the transit of artificial celestial bodies. The so-called artificial celestial bodies are spacecraft made by human beings, such as the International Space Station, China Space Station, Hubble Space Telescope and a large number of satellites. These artificial celestial bodies run regularly in space, so it can be accurately predicted that a celestial body will pass through a certain place at a certain time, so it can also be predicted that it will pass through the disk of the sun. If it happens to be sunny, according to the predicted time and place, you can wait for the rabbit and watch the spectacular scene of artificial celestial bodies passing through the sun's disk.

? There is also an occasional transit phenomenon, that is, planes and birds cross the disk of the sun. Strictly speaking, this is not a transit, but a flight over the sun. This phenomenon is irregular and unpredictable, and whether it can be hit or not depends entirely on personal luck. However, often walking by the river will inevitably wet your shoes. In areas where planes and birds pass by more, the more times you watch the sun, the greater the chance of encountering this phenomenon.

? So far, I have seen the sun countless times, and I was lucky enough to bump into two planes flying over the sun. Once, I was absorbed in watching sunspots when a plane flew over the sun. Because the plane is low, it almost blocks half of the sun. I was really shocked because I was unprepared. The whole process lasted only half a second, and then I was still in shock.

? Let's talk about a topic related to the moon, that is, it is a pleasure to look at the moon from a low angle with binoculars or SLR cameras on a clear day and at a full moon. If you are lucky, you may see or photograph birds flying over the moon.