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螺旋星云
释义
螺旋星云
Encyclopedia
理学
行星状星云
释
Helix Nebula
螺旋星云
位于宝瓶座,标准历元J2000的赤经22h29m38.54s,赤纬-20°50′13.64″的行星状星云。《星云星团新总表》中的编号为NGC7293,是离地球最近最明亮的行星状星云。
Astronomy
Helix Nebula
螺旋星云
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involutive correlation
involutive distribution
involutive functions
involutive ring
involutive subspace
involutive subvariety
involutive system
involutivity
involutorial
involutorial antiautomorphism
involutorial point ranges
involutorial ring
involutorial system
involutory
involutory algebra
involutory correspondence
involutory functions
involutory homology
involutory mapping
involutory matrix
involutory movement
involutory pair
involutory points
involutory system
involutory transformation
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