星云

The Crab Nebula spans about 10 light-years. In the nebula's very center lies a pulsar: a neutron star as massive as the Sun but with only the size of a small town. The Crab Pulsar rotates about 30 times each second

整个蟹状星云跨越约10光年，在其正中心存在一脉冲星---有太阳一样的质量但体积只有小镇大小的中子星，蟹状星云脉冲星的自转速度约为30圈每秒。

The Crab Nebula -- The Crab Nebula, the result of a supernova noted by Earth-boundchroniclers in 1054 AD, is filled with mysterious filaments that areare not only tremendously complex, but appear to have less mass thanexpelled in the original supernova and a higher speed than expectedfrom a free explosion.

蟹状星云-蟹状星云，在公元1054结果在地球方向的编年史家所指出的超新星，是充斥着神秘的细丝，不仅极其复杂，但似乎少质量比并驱逐了原超新星从一个更高的速度比预期的自由爆炸。

Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry.

行星状星云是一类孤立的气体星云，具有相当程度的双侧对称性。

Though Bob Fera just calls this a test image, I think he has done a nice job with the North American and Pelican Nebulas.

尽管Bob Fera只把这个成为一张"测试片"，我想他已经把北美星云和塘鹅星云拍得非常好了。

The Small Magellanic Cloud, named after the explorer Ferdinand Magellan, lies 200,000 light-years away, and is visible only from the Earth's southern hemisphere.

以费迪南·麦哲伦命名的小麦哲伦星云，位于距我们200，000光年的地方，而且，只有在南半球，我们才可以看见它。N81是在1950年由Karl Henize进行的名为"SMC"的观测中看见的第81个星云。

Streams of gas leaving the nebula are funneled by a strong magnetic field .

一个强大的磁场使星云的气体都在离开星云。

On the foundation of summarizing the research findings of the Homunculus nebula, we bring forward that the sticking point to solve this question is the initial condition.

本文在综述了这些研究结果基础上，提出了解决星云形成机制的关键问题是确定初始条件，即应该先研究该恒星大爆发前星云的密度分布。

A bright knot of gas and dust in the nebula 's center is known as the Hourglass Nebula .

星云中心的一个明亮的气体与尘埃的结，被命名为"沙漏星云"。

Meditations of evolution increasingly vaster: of the moon invisible in incipient lunation, approaching perigee: of the infinite lattiginous scintillating uncondensed milky way, discernible by daylight by an observer placed at the lower end of a cylindrical vertical shaft 5000 ft deep sunk from the surface towards the centre of the earth: of Sirius 10 lightyears (57,000,000,000,000 miles) distant and in volume 900 times the dimension of our planet: of Arcturus: of the precession of equinoxes: of Orion with belt and sextuple sun theta and nebula in which 100 of our solar systems could be contained: of moribund and of nascent new stars such as Nova in 1901: of our system plunging towards the constellation of Hercules: of the parallax or parallactic drift of socalled fixed stars, in reality evermoving wanderers from immeasurably remote eons to infinitely remote futures in comparison with which the years, threescore and ten, of allotted human life formed a parenthesis of infinitesimal brevity.

347关于宇宙日益扩大进化的冥想：新月期的月亮，即使在近地点也看不见。从地表向地轴挖掘纵深五千英尺的圆筒状垂直轴，一个观察者呆在轴底儿上，就连白昼也辨认得出那漫无止境、网络状、亮光闪闪、非凝结性的银河。天狼距地球十光年（五七、000、000、000、000英里）；体积大于地球九百倍；大角；岁差运动；有着"猎户"腰带、六倍于太阳的"伐二"以及星云的猎户座，星云中能容纳我们的一百个太阳系；死去的和新生的星宿，例如一九0 一年的那颗"新星"我们的太阳系正朝着武仙座冲去；所谓恒星的视差或视差移动，也就是说，实际上恒星是在不断地从无限遥远的太古朝无限遥远的未来移动着。相形之下，人的寿命充其量才七十年，不过是无限短暂的一段插曲而已。

Stellar Nursery in the Rosette Nebula -- This image from the European Space Agency's Herschel SpaceObservatory shows the cloud associated with the Rosette Nebula, astellar nursery about 5,000 light-years from Earth in the Monoceros, orUnicorn, constellation.

恒星苗圃的玫瑰星云-这天文台图片来自欧洲航天局赫歇尔空间显示，麒麟星座云相关的玫瑰，或星云，一麒麟座恒星托儿所的约5000光年，从地球研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。