微粒的飞溅不仅在水星上空形成了一个超级稀薄的大气层(更准确的说是外大气层),而且还改变了水星地表的颜色,反射比,以及化学成分。
The impacts also change the colour, reflectance and chemistry of the surface over time.
但“萤火虫1号”也将探索火星的外大气层,目的是找出这颗红色星球上水消失了的原因。
But Yinghuo 1 will also be exploring the upper atmosphere of mars-aiming to discover why water vanished from the red planet.
但是“地球大气层探秘”将触角伸向了更远的太空,到达了航天飞机的轨道200公里外的更高处。
ButEarth's atmosphere extends farther into space than you might realize, affecting the orbits of spacecraft more than 200 miles high.
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