面向 NGC 6946
Facing NGC 6946
![image](https://apod.nasa.gov/apod/image/2407/NGC6946_verB1024c.jpg)
來源:Roberto Marinoni|發表日期:2024-07-26
從銀河系的有利位置,我們可以正面看到 NGC 6946 。這個美麗的大螺旋星系位於 2000 萬光年之外,在高遠的仙王座的前景塵埃和恆星的面紗後面。在這幅清晰的望遠鏡肖像畫中,從核心向外看,星系的顏色從中心老恆星的淡黃色光,變為年輕的藍色星團,以及沿著鬆散、支離破碎的旋臂形成的淡紅色恆星區。NGC 6946 在紅外光下也很明亮,富含氣體和塵埃,顯示出很高的恆星生死率。事實上,自 20 世紀初以來,在 NGC 6946 中已經發現了 10 個被證實的超新星(大質量恆星的死亡爆炸)。NGC 6946 的直徑接近 4 萬光年,也被稱為煙花星系。
原文:From our vantage point in the Milky Way Galaxy, we see NGC 6946 face-on. The big, beautiful spiral galaxy is located just 20 million light-years away, behind a veil of foreground dust and stars in the high and far-off constellation Cepheus. In this sharp telescopic portrait, from the core outward the galaxy's colors change from the yellowish light of old stars in the center to young blue star clusters and reddish star forming regions along the loose, fragmented spiral arms. NGC 6946 is also bright in infrared light and rich in gas and dust, exhibiting a high star birth and death rate. In fact, since the early 20th century ten confirmed supernovae, the death explosions of massive stars, were discovered in NGC 6946. Nearly 40,000 light-years across, NGC 6946 is also known as the Fireworks Galaxy.
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