On March 27 in 2005
Galaxy M81
The arms of the "grand design" spiral galaxy M81 are filled with young, bluish, hot stars. The greenish regions in the image are bright, gaseous clouds where new stars are forming.
查了一下翻譯,就是這是個很年輕的銀河,充滿藍色的手臂(沒記錯的話藍色代表初期的恆星)綠色是氣態雲層,正準備要發展成恆星