| Change log entry 82725 | |
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| Processed by: | richwarm (2024-04-04 04:54:36 UTC) |
| Comment: |
<< review queue entry 76069 - submitted by 'encn' >> 发射星云是能辐射出各种不同色光的电离气体云（也就是所谓的等离子），造成电离的原因通常是来自邻近恒星辐射出来的高能量光子。这些不同的发射星云有些类型是H II区，也就是年轻恒星诞生的场所，大质量恒星的光子是造成电离的来源；而行星状星云是垂死的恒星抛出来的外壳被曝露的高热核心加热而被电离的。 An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet photons emitted from a nearby hot star. Among the several different types of emission nebulae are H II regions, in which star formation is taking place and young, massive stars are the source of the ionizing photons; and planetary nebulae, in which a dying star has thrown off its outer layers, with the exposed hot core then ionizing them. |
| Diff: |
- 發射星雲 发射星云 [fa1 she4 xing1 yun2] /radiant nebula/ + 發射星雲 发射星云 [[fa1she4 xing1yun2]] /emission nebula/ |