天鹅座也被称为北十字星。

Cygnus is also known as the Northern Cross.

天鹅座是最容易辨认的星座之一。

Cygnus is one of the most recognizable constellations.

恒星天津四（天鹅座第一亮星）是天鹅座的一部分。

The star Deneb is part of Cygnus.

你可以在夏天的夜空中看到天鹅座。

You can see Cygnus in the night sky during the summer.

天文学家经常研究天鹅座以了解更多关于宇宙的知识。

Astronomers often study Cygnus to understand more about the universe.

它的星座是天鹅座(即天鹅星座).

Its constellation is Cygnus the Swan.

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。

Around the Swan is a part of our Milky Way galaxy that is called the Cygnus Star Cloud.

天鹅座x-1最有可能是一个黑洞候选体。

Cygnus X-1 is one of the most likely black hole candidates.

天鹅座X-1最有可能是一个黑洞候选体.

Cygnus X －1 is one of the most likely black hole candidates.

最经典的例子就是天鹅座X-1，这是在天鹅座星云中发现第一次发现的X射线源。

One of the best cases known goes by the name Cygnus X-1, because it was the first X-ray source discovered in the constellation Cygnus the Swan.