cometary

基本解释

Energetic light from this star is eating away the dust of the dark cometary globule at the top right the image.
从这颗恒星发出的高能光线正把途中右上角的黯淡的彗星似的小球体中的尘埃消灭掉。
Moon rocks show that lunar water has more heavy hydrogen than does terrestrial water, indicating a cometary origin.
研究表明，月球岩石中的水资源比地球水资源包含更多的重氢元素，意即月球水有可能来源于彗星。
Moon rocks show that lunar water has more heavy hydrogen than does terrestrial water, indicating a cometary origin. Christopher Intagliata reports The Apollo moon missions ended almost 40 years ago.
研究表明，月球岩石中的水资源比地球水资源包含更多的重氢元素，意即月球水有可能来源于彗星。

There might be even more: the measurements probe only the top half-metre of regolith, but it is thought that cometary bombardment could have left ice in the top two metres.
ECONOMIST: At least lunar gold-diggers will be able to take a shower