4 天之前 · Nebulae exist in the space between the stars—also known as interstellar space. The closest known nebula to Earth is called the Helix Nebula. It is the remnant of a dying star—possibly one like the Sun. It is approximately 700 light-years away from Earth.

A nebula (Latin for 'cloud, fog'; [1] pl. nebulae or nebulas) [2][3][4][5] 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, …

星云（Nebula），是稀薄的气体或尘埃构成的天体之一。 包含了除行星和 彗星 外的几乎所有延展型天体。 它们的主要成分是氢，其次是 氦，还含有一定比例的 金属元素 和 非金属元素。 1990年 哈勃望远镜 升空以来的研究还发现含有 有机分子 等物质。 [1] 星云（源自 拉丁文 的：nebulae或nebul&aelig，与ligature或nebulas，意思是云或雾）是尘埃、氢气、氦气和其他 电离气体 聚集的 星际云。 原本是天文学上通用的名词，泛指任何天文上的扩散天体，包括在 银河系 之外的 星 …

2024年10月23日 · From Earth, some nebulae are visible with the naked eye, while others are only seen with the help of powerful telescopes. What Is a Nebula? A nebula is a giant cloud of gas and dust in space. Nebulae can serve as stellar nurseries where new stars are born or as the remnants of stars that have exploded as supernovae.

2024年6月17日 · Nebula is Latin for "mist, vapor, fog, smoke, exhalation," but in an astronomical context, it refers to any celestial object that appears cloud-like when viewed through a telescope.

2023年6月11日 · Nebulas — colorful clouds of expanding gas and dust — have long captivated stargazers with their beauty. Here are 25 of the most stunning nebulas in the universe.

2021年8月23日 · Nebulae are giant clouds of gas and dust in space. They’re commonly associated with two parts of the life cycle of stars: First, they can be nurseries forming new baby stars. Second, expanding clouds of gas and dust can mark where stars have died.

2025年3月4日 · Una nebulosa es una nube gigante de polvo y gas en el espacio. Algunas nebulosas provienen del gas y el polvo expulsado por la explosión de una estrella moribunda, como una supernova. Otras nebulosas son regiones donde comienzan a formarse nuevas estrellas. Por esta razón, algunas nebulosas se llaman "viveros de estrellas".

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More realistically, the nebula would be evolving under the influence of internal viscous forces and the tidal forces of embedded giant planets. These include the 21 and 30 mm emission features, and the extended red emission observed in protoplanetary nebulae and planetary nebulae.