As the comet nears the sun, its ice melts, releasing gas and dust that stream away into space.
当彗星靠近太阳时,它的冰层融化,释放的气体和尘埃飘向太空。
Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are screened off.
来自外太空的各种宇宙射线通过空气进入大气层,但来自太阳的大量辐射却被屏蔽了。
There is nothing but the sun, the moon and the stars in space.
太空中只有太阳、月亮和星星。
Astronomers use the observatory to study the positions and movements of the Earth, sun,moon and other objects in space.
VOA: special.2009.09.21
The American space agency's Dawn spacecraft began circling Vesta, a member of the asteroid belt that orbits the sun.
VOA: special.2011.07.27
Shuttle Discovery left behind a pink and gold plume of smoke as it took off Sunday evening, with the sun setting on the Kennedy Space Center in Florida.
VOA: standard.2009.03.15
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