船底座大星云
影像来源与版权:Dieter Willasch (Astro-Cabinet)

说明:船底座大星云的中央发生了什么?许多恒星正在诞生和消亡,形成了一幅由黑暗丝状尘埃构成的壮丽织锦。船底座大星云被编录为NGC 3372,其跨度超过300光年,位于船底座内距离我们约8500光年远处。该星云主要由氢气构成,它放射出在这幅非常精细的特征影像中随处可见的红光。而影像中央的蓝光则是由极微量的炽热氧气发出的。当该星云中央的年轻大质量恒星发生超新星爆炸时,会抛出大量尘埃。海山二星是该星云中央最高能的恒星,是19世纪30年代天空中最明亮的恒星之一,但随后便急剧变暗。
翻译:北京天文馆

The Great Nebula in Carina
Image Credit & Copyright: Dieter Willasch (Astro-Cabinet)

Explanation: What’s happening in the center of the Carina Nebula? Stars are forming, dying, and leaving an impressive tapestry of dark dusty filaments. The entire Carina Nebula, cataloged as NGC 3372, spans over 300 light years and lies about 8,500 light-years away in the constellation of Carina. The nebula is composed predominantly of hydrogen gas, which emits the pervasive red glow seen in this highly detailed featured image. The blue glow in the center is created by a trace amount of glowing oxygen. Young and massive stars located in the nebula’s center expel dust when they explode in supernovae. Eta Carinae, the most energetic star in the nebula’s center, was one of the brightest stars in the sky in the 1830s, but then faded dramatically.
Astronomy Picture of the Day 05/07/2019