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开阳和辅
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开阳和辅
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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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gas bubble chamber
gas burn
gas burner
gas burst
gas-cap gas drive
gas cap reservoir exploitation
gas carburizing
gas cell
gas centrifuge method
gas centrifuge process
gas centrifuge process; gas centrifuge method
gas chimney
gas chromatograph
gas chromatograph coupled with Fourier transform infrared spectrometer
gas chromatograph coupled with Fourier transform infrared spectrometer (GC-FTIR)
gas chromatographic separation
gas chromatograph mass spectrometer
gas chromatograph-mass spectrometer
gas chromatograph mass spectrometer (GC MS)
gas chromatograph-mass spectrometer (GC-MS)
gas chromatography
gas chromatography (GC)
Gas Chromatography-Mass Spectrometry
gas chromatography mass spectrometry
gas chromatography-mass spectrometry
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