单词：simplex solar shield
单词：simplex solar shield 相关文章
诸多线索综合起来为我们描绘出一幅画面：那是火星遥远的过去，那时的火星还有着一层厚厚的大气层，令这颗星球温热暖和，从而使水能够在火星表面流淌。但如今，地表的水消失不见，而
60秒科学
NASA Spacecraft to Study the Sun Up Close The United States space agency will launch a spacecraft to explore the sun more closely than ever before on Saturday. NASAs Parker Solar Probe will fly through the hot solar atmosphere and come within just 6
2018年VOA慢速英语(八)月
The United States space agency will launch a spacecraft to explore the sun more closely than ever before on Saturday. NASAs Parker Solar Probe will fly through the hot solar atmosphere and come within just 6 million kilometers of the suns surface. Th
2018年VOA慢速英语(八)月
The clues are adding up to give a picture of a distant Martian past, when the planet had a thick atmosphere that was warm enough for water to stream on the surface. But now the waters gone, and the atmosphere is so thin that any water would boil away
Scientific American(十)月
The solar system is a hostile place. Earth is under attack from deadly cosmic radiation. Life here is only possible, because it's protected by the magnetosphere, an invisible force field that cocoons the planet. But new evidence reveals that this vit
自然百科2011年
Like Mercury, the earth takes a beating from the sun's violent temper. Flares, sun storms and other solar hissy fits can cause electronic mayhem for the satellites that roam above our heads. Fortunately, the earth is protected from this radiation by
自然百科2012年