银河系

Recent surveys of the sky in near- infrared light , which penetrates the dust clouds that block our view of the galactic core, have revealed the bar directly and dispelled the remaining doubts.

近红外光可穿透挡住我们视线的尘云，而最近的近红外光巡天观测银河系核心的结果，直接显现了棒状结构，也就排除了其他的可能。

Being given,an exact solution of the spatial distribution of interstellar gas is obtained,and the peak distribution of gas in disk-shaped galaxies is discussed.

分析了星系翼的一般特征，并具体地计算了银河系中星际气体的等密度曲线，提出了银河翼结构的一些可能趋势。

This red cloud, composed of hydrocarbon dust similar to car exhaust, is being blown out into space by the galaxy's millions of young stars.

这个红色云，组成由碳氢化合物粉尘类似于汽车排气管，是吹出来进入太空的银河系的数以百万计的年轻恒星。

All of the chemical elements, other than hydrogen and helium, have only about one-tenth the abundances seen in our own galaxy.

所有的金属元素的丰度，只有我们银河系的十分之一。

Note 2: Previous studies for this star have shown that the abundances of metals such as iron and calcium are about 30 times lower than in the Sun, while the elements heavier than iron are as rich as the Sun's.

注2：先前研究这颗恒星已经表明，银河系中的金属，如铁，钙约有30时报低于太阳，而更重的元素，比铁都是那么富有太阳的。

In fact, with over twice the diameter of our own Milky Way, Andromeda is the largest nearby galaxy.

事实上，它的直径是我们银河系的2倍多，是我们附近最大的星系。

He suggested the following figures should be multiplied: how many stars are formed in the galaxy in a year; what fraction of these have planets and thus form solar systems; the average number of planets per solar system that have the potential to support life; on what percentage of those where it is possible do such biospheres actually form; what percentage of such biospheres give rise to intelligent species; what percentage of intelligent life is able to transmit signals into space; and for how long could such intelligence keeps sending signals.

他的方法包括一系列应该纳入考虑范围的数据：银河系每年新诞生的恒星数；拥有行星并组成了星系的恒星比率；有可能会出现生命迹象的行星平均数；以上行星能够真正孕育生命的比率；演化出了智能物种的比率；能使用无线电通讯与外太空联系的智能生物比率；智能生物使用无线电通讯方式的持续时间。更多信息请访问： http：//www.24en.com

He suggested the following figures should be multiplied: how many stars are formed in the galaxy in a year; what fraction of these have planets and thus form solar systems; the average number of planets per solar system that have the potential to support life; on what percentage of those where it is possible do such biospheres actually form; what percentage of such biospheres give rise to intelligent species; what percentage of intelligent life is able to transmit signals into space; and for how long could such intelligence keeps sending signals.

他的方法包括一系列应该纳入考虑范围的数据：银河系每年新诞生的恒星数；拥有行星并组成了星系的恒星比率；有可能会出现生命迹象的行星平均数；以上行星能够真正孕育生命的比率；演化出了智能物种的比率；能使用无线电通讯与外太空联系的智能生物比率；智能生物使用无线电通讯方式的持续时间。

A new space hypothesis of petroleum origin is offered in the article on the basis of the analysis of pre-sent hypotheses of petroleum origin,nature of distribution of bitumens and oils in Earth crust,history of a climate of the Earth and astrophysical data about widespread occurrence of hydrocarbons in the Universe,one of the possible scenari-ous of repeated hydrocarbons entry to the Earth is indicated.

该假说认为，围绕着银河系旋转的太阳系，在穿过星际尘云时与微球体发生碰撞，在太阳射线紫外光和冲击波的作用下，含有大量水分子、高分子化合物以无定形碳形式出现的星际尘云，被分解为各种接近于石油组分的烃类，并以石油雨的形式沉落在地球上。

Although Cepheids are rare, they provide a very reliable"standard candle" for estimating intergalactic distances.

虽然造父变星数量稀少，它们是估计银河系间距离的一种非常可靠的&标准烛光&。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。