Nebula
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What Is a Nebula? | NASA Space Place – NASA Science for Kids
在spaceplace.nasa.gov上查看更多信息Nebulae are made of dust and gases—mostly hydrogen and helium. The dust and gases in a nebula are very spread out, but gravity can slowly begin to pull together clumps of dust and gas. As these clumps get bigger and bigger, their gravity gets stronger and stronger. This landscape of "mountains" and "valleys" speckled wit…Nebula - Wikipedia
A nebula (Latin for 'cloud, fog'; pl.: nebulae, or nebulas ) is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral, or molecular hydrogen and also cosmic dust. Nebulae are often star-forming regions, such as in the Pillars of Creation in the Eagle Nebula. In these regions, the formations of gas, dust, and other materials "clump" together to form denser regions, which …
Wikipedia · CC-BY-SA 许可下的文字Nebula | Definition, Types, Size, & Facts | Britannica
Nebula, any of the various tenuous clouds of gas and dust that occur in interstellar space. The term was formerly applied to any object outside the solar system that had a diffuse appearance rather than a pointlike image, as in the …
Nebula: Definition, location and variants - Space.com
2024年6月17日 · Nebula are giant clouds of interstellar gas that play a key role in the life-cycle of stars.
星云（宇宙天体）_百度百科
发射星云（Emission nebula）是由星际气体组成的发光的云。 光谱中在很弱的连续背景上有许多发射线的亮星云。 发射线主要由氢、氦、氧、硫、氖和铁的原子和离子产生，其中有些是禁线。
星云 - 维基百科，自由的百科全书
鷹星雲的創生之柱 三角座的發射星雲：Garren Nebula NGC 604。 NASA製作的蟹狀星雲短片。 星雲（源自拉丁文的：nebulae、nebulæ或nebulas，意思就是“雲” [1] ）是宇宙塵、氫氣、氦氣和其他等離子體聚集的星際雲。
Nebula – Definition, Examples, Types, Facts - Science …
2024年10月23日 · Learn about a nebula in astronomy. Discover what a nebula is, types of nebulae, and their role in a star's life cycle.
Decoding Nebulae - NASA Science
2021年8月23日 · The nebula, cataloged as NGC 1999, is a reflection nebula, which shines by reflecting light from a nearby star. Unlike emission nebulae, whose reddish glow comes from excited atoms of gas, reflection nebulae have …
NASA SVS | Hubble's Field Guide to Nebulae
2021年11月1日 · Nebulae are some of the most resplendent objects in the universe, but it’s easy to confuse which one is an “emission nebula,” and which one is an “absorption nebula.” Thankfully, this “Field Guide” will give you a …
