Around the Swan is a part of our Milky Way galaxy that is called the Cygnus StarCloud.
围绕着天鹅座的是我们银河系的一部分，被称为天鹅座星云。
2
The flowing and precipitating of colors produce the seemingly feeling of storm and starcloud, and the dark background makes them more mysterious.
色彩的流动和沉积形成了类似风暴和星云的感觉，漆黑的背景中显得更加神秘和诡异。
3
The brightening since 2006 could be caused by the black hole's capturing winds from an orbiting star, or by a gas cloud that spiraled into the black hole.