Glossary term: 行星形成
Description: 當宇宙氣體雲坍縮形成恆星時，這顆新生恆星被一個由氣體和塵埃組成的漩渦盤所包圍。這就是行星形成的原行星盤：被冰覆蓋的塵埃粒子會相互粘連，形成稍大的團塊，並繼續增大。至於接下來會發生什麼，還有一些問題還尚未解決：例如，湍流氣體運動在拉近這些團塊之間的距離方面起著什麼作用？但最終結果是，塵埃粒子會形成大小超過一公裡的所謂 "小行星"。其中一些被自身的引力拉到一起，形成更大的行星，另一些則留下來，成為第一顆小行星。一些原行星設法將大量氣體吸向它們，成為氣態巨行星。還有一些原行星位於遠離中心恆星的寒冷區域，它們會與氣體一起吸積大量的冰凍物質，成為冰巨行星。其他一些氣體較少的原行星則會成為陸地行星。
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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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