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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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biordered set
bioreaction and separation coupling
bioreaction heat transfer
bioreaction strengthen
bioreactor
bioreactor for tissue construction
bioreactor for wastewater biological treatment
bioreactor landfill
bioreactor mass transfer
biorecognition
bioreductive drug
biorefinery
biorefining
bioregenerative life support system
bioremediation
bioremediation for the soil pollution
bioremediation of contaminated sea areas
bioremediation of contaminated soil
bioremediation of nuclear contamination
bioremediation technology of fishery environment
bioretention system
biorheology
biorhythm
biorhythmic secretion
biorisk assessment
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