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蟹状星云
释义
蟹状星云
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理学
蟹状星云
释
Crab Nebula
蟹状星云
金牛座的一团无定形的膨胀气体云。星表中的编号为M1和NGC1952。标准历元J2000为赤经05h34m31.94s,赤纬+22°00′52.2″。角径为7′×4′,视亮度相当于9等星。
Astronomy
Crab Nebula
蟹状星云
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first hitting decomposition
first hit ting time
first hit-ting time
first hitting time
first homotopy theorem
first impression
First impression effect
first incompleteness theorem
first in first out
first-in first-out
first in first out, FIFO
first-in,first-out method
first-in-man study
First Institutional Act
first integral
first integral of Euler equations
First International Conference of American States
First International Congress of Africanists
first interrogation
First Investigation
first ion cyclotron wave
first isodynamic point
first isogonic center
first isomorphism theorem
first item inspection
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