Glossary term: 恆星形成
Description: 恆星的誕生源於巨型分子雲中被稱為核心的低溫緻密區域的引力坍縮，這些區域大多位於星系的旋臂中。恆星的形成涉及復雜的物理過程，發生在不同的尺度上，由引力、壓力、輻射、磁場、湍流、化學等作用造成，其中有些作用至今仍不甚明瞭。根據母雲的質量和形成階段的吸積過程，恆星的質量從 0.08 到幾百個太陽質量不等。大多數恆星都不是孤立形成的，而是恆星群的一部分。在形成階段，中心恆星週圍會形成一個原恆星盤，最終為行星的形成提供原材料。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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In Other Languages
- 阿拉伯語: تشكّل النجوم
- 德語: Sternentstehung
- 英語: Star Formation
- 法語: Formation des étoiles
- 義大利語: Formazione delle stelle
- 日語: 星形成 (external link)
- 簡體中文: 恒星形成
Related Media
見證一顆恆星的誕生
Caption: 阿塔卡馬大毫米波/亞毫米波陣列（ALMA）和歐洲南方天文臺新技術望遠鏡（NTT）拍攝的射電和可見光組合圖像，揭示了赫比格-哈羅天體 HH 46/47 中一顆恆星的誕生過程。橙色和綠色的 ALMA 數據揭示了來自中央原恆星的高能噴流，由於塵埃遮擋和高密度氣體的存在，該噴流在可見光波段被掩蓋。粉色和紫色的 NTT 數據突出顯示了噴流向觀測者發射的可見光。
Credit: ESO/ALMA (ESO/NAOJ/NRAO)/H.Arce. 致謝：Bo Reipurth
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License: CC-BY-3.0 Creative Commons Attribution 3.0 Unported icons
恆星誕生環境
Caption: 使用阿塔卡馬大型毫米/亞毫米波陣（ALMA）和甚大陣（VLA），拍攝了獵戶座分子雲中多顆原恆星形成的快照，更仔細地觀察了每顆原恆星。對於恆星形成的過程和早期階段，以及恆星從中形成的母雲所產生的影響，這樣的圖像提供了獨特的見解。
Credit: ALMA (ESO/NAOJ/NRAO), J. Tobin; NRAO/AUI/NSF, S. Dagnello; Herschel/ESA
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License: CC-BY-3.0 Creative Commons Attribution 3.0 Unported icons
The Pillars of Creation in comparison
Caption: The 'Pillars of Creation' are a renowned astronomical feature situated within the Eagle Nebula in the Serpens constellation. The illustration provides a direct comparison between images captured by the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST), showcasing the pillars, which span several light years in diameter, in both visible light (also known as optical light) and infrared light. On the left are the pillars as seen by Hubble in visual light, taken in 2014. It displays dark pillars against an opaque background, with only a handful of visible stars. Conversely, the counterpart on the right is Webb’s near-infrared view published in 2022, penetrating the dust and revealing numerous stars of varying sizes.
Their distance from Earth is approximately 6,500 to 7,000 light years. Within these pillars, new stars are constantly forming, making them a subject of extensive study by astronomers. Composed mostly of cool molecular hydrogen and small amounts of interstellar dust, they are subject to erosion by the intense ultraviolet radiation emitted by nearby massive and newborn stars, a process known as photoevaporation.
Credit: NASA, ESA, CSA, STScI
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License: CC-BY-2.0 Creative Commons Attribution 2.0 Generic icons
Herschel’s view of new stars and molecular clouds
Caption: This image shows the Westerhout 3, 4 and 5 star formation regions. This area has huge amounts of gas and dust. This gas and dust hides the physical processes going on in this region from studies using visible light. This image was taken in infrared light by the Herschel Space Observatory. This infrared light allowed Herschel to see deep into these star forming regions.
In Westerhout 3, 4 and 5, huge, cold clouds of molecular hydrogen have collapsed into dense knots and filaments. Within these new structures the gas is dense and cold enough for it to collapse and form stars. These new stars give off powerful winds of charged particles, like stronger versions of the solar wind our sun gives off. These winds have combined to blow massive bubbles in the surrounding gas and dust. These are visible as the large darker voids in the image.
Credit: ESA/Herschel/NASA/JPL-Caltech; acknowledgement: R. Hurt (JPL-Caltech)
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License: CC-BY-3.0-IGO Creative Commons Attribution 3.0 IGO icons
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