NGC 7293 :螺旋星雲
NGC 7293: The Helix Nebula
來源:Patrick Winkler|發表日期:2024-10-24
在距離地球僅 700 光年的寶瓶座,一顆恆星正在消亡。這顆曾經像太陽一樣的恆星在最後的幾千年裡產生了螺旋星雲。這個宇宙螺旋星雲也被稱為 NGC 7293 ,是一個經過深入研究的行星狀星雲,也是恆星演化最後階段的典型例子。 這張深度影像結合了紅色氫原子和藍綠色氧原子發射線的窄帶資料,顯示了螺旋星雲的誘人細節,包括其直徑約 3 光年的明亮內部區域。螺旋中心的白點就是這個行星狀星雲炙熱、垂死的中心恆星。乍看之下,螺旋星雲很簡單,但現在人們瞭解到,它的幾何結構複雜得令人吃驚。
原文:A mere seven hundred light years from Earth toward the constellation Aquarius, a star is dying. The once sun-like star's last few thousand years have produced the Helix Nebula. Also known as NGC 7293, the cosmic Helix is a well studied and nearby example of a Planetary Nebula, typical of this final phase of stellar evolution. Combining narrow band data from emission lines of hydrogen atoms in red and oxygen atoms in blue-green hues, this deep image shows tantalizing details of the Helix, including its bright inner region about 3 light-years across. The white dot at the Helix's center is this Planetary Nebula's hot, dying central star. A simple looking nebula at first glance, the Helix is now understood to have a surprisingly complex geometry.
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