Major improvement has been made in the studies of interstellar molecular clouds and star formation.
一方面是星际分子云与恒星形成的天文研究取得了令人瞩目的成就 。
The diurnal cycle of tropical cloud amount was analyzed by using a 20-year International Satellite Cloud Climatology Project (ISCCP) dataset.
利用国际卫星云气候计划(ISCCP)1984—2003年共20年云量资料,统计分析了热带地区的云量日变化特征,研究结果表明,云量峰值时间和变化幅度在全球的分布都较为均匀,而海陆差异明显。
A second need is to develop additional arguments for the "genetic coupling" of clouds and stars.
第二大任务就是提出星际云和恒星间“遗传关系”的补充证据。
The paramount task here facing observational astronomy is to study real interstellar clouds.
实测天文学在这里所面临的头等任务是研究实际的星际云。
The magnetic lines of force are in effect glued to the interstellar gas, and they follow the clouds in their capricious motions.
磁力线实际上是紧附在星际气体上，并跟随星际云一道作着变化莫测的运动。
Collapsing interstellar cloud reverses its gravitational infall and expands outward into the relatively quiescent interstellar environment.
坍缩的星际云克服向内的引力而向外膨胀到较宁静的星际环境中去。
Figure 2.1 illustrates the departures of chemical composition from solar values for five different clouds projected against bright stars.
图2．1揭示出五个不同的投影在亮星背景上的星际云的化学组成对太阳值的偏差。
International Satellite Cloud Climatology Project
国际卫星云气候学项目
International Satellite Cloud Climatology Project (ISCCP)
国际卫星云气候学计划
The remnant nebular gas pervades the interplanetary space.
星云的残余气体充斥星际空间。
clouds of particles or gases occurring throughout interstellar space.
遍及星际空间的微粒或气体组成的云。
A nebula is really a discrete mass of innumerous stars.
一团星云实际上是无数星体不连续的集合体。
Such tumultuous, often visually spectacular, interstellar regions surrounding youthful stars are known as gaseous nebulae.
这种环绕着年轻星的动荡且常常是壮观的星际区域，叫做气体星云。
In fact, the cosmic Crab is now known to be a supernova remnant, an expanding cloud of debris from the death explosion of a massive star.
实际上,现在我们知道蟹状星云是超新星爆发的遗迹,即一个巨大恒星死亡后爆炸的残屑云。
Characteristics of Electron Distribution Functions in Magnetic Cloud Boundary Layers
行星际磁云边界层中的电子分布函数特征
A star is formed when a cloud of gas collapses from the interstellar medium toward high density.
一个气体云自星际物质中坍缩，密度达到很高时，即形成了一个恒星。
Molecular clouds play an integral role in the prestellar evolutionary sequence of interstellar matter.
分子云在星际物质的星前期演化序列中起着不可缺少的作用。
New Gypsophila paniculata Cultivars ‘Yunxing 17’ and ‘Yunxing 23’
满天星新品种‘云星17’和‘云星23’
Interstellar gas clouds frequently collide and convert their kinetic energy into shock waves and radiation.
星际气体云经常在碰撞间将动能传给冲击波和辐射。
an immense cloud of gas (mainly hydrogen) and dust in interstellar space.
在星际空间中的一种无边的由气体（主要成分为氢）和灰尘组成的云。