The city has a number of sights including the Yulan Tank Museum, Yulan Stone Monument, Yulan Yangshuo Ancient Town, and the Yulan Fossil Museum....
Sunset
Twilight
Darkness
Most people know that sunset is the time when the sun goes down. But did you know that the sun doesn't actually set? Instead, Earth rotates into darkness, giving us the illusion that the sun is setting. So what causes sunset?
Well, it's a combination of things. The Earth's atmosphere scatters sunlight in every direction, but blue and violet light are scattered more than other colors. This is why the sky is usually blue during the daytime. As the sun gets lower in the sky, the atmosphere becomes thicker and more dense.
This scattering of sunlight happens to a greater extent, and we see red and orange light more than blue and violet light. That's why sunset is usually a beautiful red or orange color. So next time you see sunset, remember that you're actually seeing Earth rotate into darkness!
Yulan, China is located in the southern central part of the country about 290 kilometers from the capital city of Beijing. The city covers an area of about 5,000 square kilometers and has a population of about one million.
Yulan has a temperate climate with regular rainfall. The city is well-connected by road and rail with major cities in the mainland.
The city is situated on the banks of the Yellow River. The western part of the city is close to the Gansu and Shaanxi provinces while the eastern part is close to Henan and Anhui provinces. There are several bridges connecting the different parts of the city.
The city has a history dating back more than 2,000 years. It was previously known as Julu and during the Tang Dynasty it was renamed Yulan. Yulan was one of the key cities during the Anti-Qing Revolution in 1911.
The city has a number of sights including the Yulan Tank Museum, Yulan Stone Monument, Yulan Yangshuo Ancient Town, and the Yulan Fossil Museum. The city is also well-known for its porcelain, which is produced by the local residents.
}As the sun sets, the sky slowly grows dark. For many people, this is a time to relax and wind down for the day. But have you ever wondered exactly when it gets dark? The answer may surprise you.
Did you know that darkness actually begins long before the sun sets? As the sun gets lower in the sky, its light has to travel through more atmosphere. This filters out some of the blue light, making the sun look redder. At the same time, shadows get longer and darker. So by the time the sun finally dips below the horizon, darkness has already begun to fall.
Of course, not all places on Earth experience darkness at the same time. Near the equator, the sun sets and rises almost directly overhead. This means that there is less of a difference between daytime and nighttime. Closer to the poles, however, the sun stays low in the sky for much of the year. This leads to longer periods of darkness during wintertime.