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Mizar and Alcor
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Mizar and Alcor
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Mizar and Alcor
开阳和辅
开阳,大熊座ζ,是北斗七星勺柄末端的第二颗星;辅,大熊座80星,是开阳的暗伴星,开阳和辅组成了大熊星座的一个目视双星系统。在标准历元J2000赤道坐标系中,赤经为13h23m55.5s,赤纬为+54°55′31″,距离太阳约有83光年。研究发现,开阳和辅实际上是一个六合星聚星系统。
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rigid-plastic finite element method
rigid-plastic problem
rigid polyhedron
rigid pseudogroup structure
rigid regulation of public opinion
rigid representation of quiver
rigid restriction
rigid rod
rigid rotator
rigid rotor
rigid rotor; rigid rotator
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rigid solution
rigid space
rigid sphere model
rigid structure
rigid submanifold
rigid surface
rigid system
rigid theorem
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