Noctilucent clouds are crystals of ice hanging around 80 kilometres high in the atmosphere that catch the light of the sun long after it has set on the horizon .
夜光云是悬挂在大气80千米上空,在太阳升上地平线后吸收太阳光的晶体冰。
One of these missions , a satellite called aeronomy of ice in the mesosphere , or aim , was launched in april to study so-called noctilucent clouds ( depicted above ) , the highest layer of clouds in the atmosphere .
13 Noctilucent clouds seemed to first appear after the 1883 eruption of krakatoa and are now a common sight .
13夜光云似乎首次出现是在1883年喀拉喀托火山(krakatoa)喷发之后,而现在则已司空见惯。
12 Highest of them all : 50 miles up , noctilucent , or " night shining , " clouds glow an eerie bluish white .
12最高的云:夜光云,也称“黑夜闪耀”云,存在于在离地50英里的高空,云朵焕发怪异的蓝白色光芒。
Ethereal : noctilucent clouds are crystals of ice hanging around 80km high in the atmosphere that catch the light of the sun long after it has set on the horizon .
飘渺:夜光云是悬挂在大气80千米上空,在太阳升上地平线后吸收太阳光的晶体冰。
Noctilucent clouds are crystals of ice hanging around 50 miles high in the atmosphere that catch the light of the sun long after it has set on the horizon .