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Helix Nebula
释义
Helix Nebula
Encyclopedia
理学
行星状星云
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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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analytic algebra
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Analytical Instrumentation
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analytically complete domain
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analytically degenerate mapping
analytically homeomorphic manifold
analytically hypoelliptic operator
analytically independent elements
analytically irreducible ring
analytically normal ring
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analytically representable function
analytically thin set
analytically uniform space
analytically unramified ring
analytical map
analytical Marxism
analytical mechanics
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更新时间:2025/3/15 21:10:59