星云

M78 appears above only as it was 1600 years ago, however, because that is how long it takes light to go from there to here. M78 belongs to the larger Orion Molecular Cloud Complex that contains the Great Nebula in Orion and the Horsehead Nebula.

上面影像中看到的M78是1600年前的景象，因为它发出的光需要经过那么长的时间才能到达地球。M78属于猎户座复杂大分子云的一部分，而猎户座大星云和马头星云也包含在其中。

Explanation: Adrift 1,500 light-years away in one of the night sky's most recognizable constellations, the glowing Orion Nebula and the dark Horsehead Nebula are contrasting cosmic vistas.

nbsp；说明：在夜空中的大多数可见的星座中，漂泊在1500光年之外的灼热的猎户座大星云和马头暗星云是宇宙中的一个对比。

Adrift 1,500 light-years away in one of the night sky's most recognizable constellations , the glowing Orion Nebula and the dark Horsehead Nebula are contrasting cosmic vistas.

离我们1，500光年远，位在夜空最易辨认星座之一内的猎户座大星云和马头星云，是一组对比鲜明的宇宙景点。

Explanation: Adrift 1,500 light-years away in one of the night sky's most recognizable constellations, the glowing Orion Nebula and the dark Horsehead Nebula are contrasting cosmic vistas.

说明： 离我们1，500光年远，位在夜空最易辨认星座之一内的明亮猎户座大星云和黝黑马头星云，是一组对比鲜明的宇宙景点。

Astronomers are especially keen to study star formation in the Small Magellanic Cloud, because its chemical composition is different from that of the Milky Way.

天文学家们对小麦哲伦星云中恒星的形成一直和热衷，因为，小麦哲伦星云的化学组成和银河系的不同。

These stars formed about four million years ago from the nebular material and their stellar winds are clearing a hole in the nebula's center, insulated by a layer of dust and hot gas.

这些星星是在约四万年前从星云原料中形成的，而他们的恒星风在星云的中心吹出一个洞，被一层的尘埃与炙热气体所隔离。

These stars formed about four million years ago from the nebular material and their stellar winds are clearing a hole in the nebula's center, insulated by a layer of dust and hot gas.

在大约4百万年前，这些恒星从它周围的星云物质中形成的。它们所发出的恒星风在星云的中心挖出一个空洞，而空洞的边缘有一层由尘埃和炽热气的隔离层。

The most obvious advantage is that because of their inability to scatter appreciably, nebular radio waves completely and genuinely delineate the distribution of nebular gas

因为星云对射电波的散射很小，所以最明显的优点就是能够全面而真实地勾画出星云气体分布的外貌。

In the General History of Nature and Theory of the Heavens (1755), Kant laid out the Nebular hypothesis, in which he deduced that the Solar System formed from a large cloud of gas, a nebula.

在《宇宙发展史概论》中，康德提出了&星云假说&，认为太阳系源自一大团气体星云。

These stars formed about four million years ago from the nebular material and their stellar winds are clearing a hole in the nebula's center, insulated by a layer of dust and hot gas.

在四百万年以前，星云物质聚集形成了这些恒星，它们的星风（一种从恒星不断向外运动的物质流，类似于太阳风）在星云中央清理出了一个空洞，这个空洞被一层尘埃和灼热气体所包围隔绝。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。