near-earth comet 中文意思是什麼
near-earth comet
解釋
近地彗星-
Draconid meteor shower, associated with comet 21p giacobini - zinner, is not a major meteor showers throughout the year. it approaches the sun every 6. 61years. if the earth is near the comet s perihelion during that period, a stronger meteor shower may occur
它的母體是21p giacobini - zinner彗星,每6 . 61年回歸一次,若當時地球較接近彗星的近日點,便有可能出現較可觀的流星雨。 -
Near - earth comet
近地彗星 -
Fascinated sky enthusiasts in the earth ' s northern hemisphere were treated to an instantly visible comet head and a faint elongated tail near sunrise and sunset
北半球的眾多天文迷在黃昏和清晨爭睹這顆擁有肉眼可見的彗核以及細長的彗尾的彗星。
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