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Astrometry
A branch of astronomy that deals with the measurement of the position and motion of celestial bodies.
Industry: Astronomy
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Astrometry
星星
Astronomy; Astrometry
恒星是發光等離子體由重力在一起的結合。是來自恒星的光是由其核心中氫熱核融合產生的。在超新星核合成 (爆炸中的恒星)，期間創建了大多數比氦重的元素。A 星形成時大量的氫、 氦和其他物質較少數量的變得足夠稠密，和核聚變的一個進程發生轉換在氦氣中的氫。 ...
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