It is mostly made of ionized hydrogen and helium, though carbon, oxygen, nitrogen and other atoms are present, producing the complex color blend visible here.
它主要由电离氢分子和氦构成，同时还包括碳、氧、氮和其他原子，使得其呈现纷繁的混合色彩。
2
This false color image combines emission from ionized hydrogen in blue, oxygen in green, and nitrogen in red.
这张照片并非肉眼所见的颜色，而是离子化氢呈蓝色、氧呈绿色、氮呈红色的画面。
3
The image was captured using four narrow-band filters that have been tuned to see hydrogen as well as ionized helium, sulfur and oxygen.