望远镜

Edited by Terence Dickinson, author of 14 books, including NightWatch and The Backyard Astronomer's Guide, a subscription to SkyNews ensures that you will stay abreast of the latest developments in the world of astronomy, enjoy expert advice on astronomy-related equipment, receive discounts to museums and space centres across North America and have a chance to WIN your very own Black Diamond ED80 telescope from Skywatcher, including a 2" 90 Dielectric Diagonal with 1.25" adapter and quality foam-lined metal carrying case.

由包括 《NightWatch》和《The Backyard Astronomer's Guide》等14本书的作者Terence Dickinson编辑本杂志。保证让你走在世界天文学的发展前沿，享受天文学专家咨询有关设备的建议。可以得到博物馆和北美空间中心商品目录并有机会赢取属于您自己的黑钻石ED80望远镜，其中包括2" 90 °角的介质1.25"适配器和泡沫内衬金属手提箱

Edited by Terence Dickinson, author of 14 books, including NightWatch and The Backyard Astronomer's Guide, a subscription to SkyNews ensures that you will stay abreast of the latest developments in the world of astronomy, enjoy expert advice on astronomy-related equipment, receive discounts to museums and space centres across North America and have a chance to WIN your very own Black Diamond ED80 telescope from Skywatcher, including a 2" 90o Dielectric Diagonal with 1.25" adapter and quality foam-lined metal carrying case.

由包括 《NightWatch》和《The Backyard Astronomer's Guide》等14本书的作者Terence Dickinson编辑本杂志。保证让你走在世界天文学的发展前沿，享受天文学专家咨询有关设备的建议。可以得到博物馆和北美空间中心商品目录并有机会赢取属于您自己的黑钻石ED80望远镜，其中包括2" 90 °角的介质1.25"适配器和泡沫内衬金属手提箱

"This is strikingly similar to the comet Shoemaker Levy 9 that impacted Jupiter in July 1994", said team member Keith Noll of

"这与苏梅克——列维9号1994年与木星相撞真是惊人的相似"，太空望远镜科学研究所的小组成员基斯·诺尔说。

Development of a space soft X-ray and EUV normal incidence telescope .

空间软X射线/极紫外波段正入射望远镜研究。

Based on the third-order aberration theory of two-mirror reflecting system, the influence of the geometrical aberrations on the performance of normal incidence telescopes was analyzed.

基于三级象差理论，分析了几何象差对正入射望远镜性能的影响，总结了弥散斑角宽度θ随着系统f数和半视场角uP的变化趋势。

It is said that recently US soldiers, fighting in Iraq, were eager to capture NVA DF binoculars which were still abundant among Iraqi's troops.

这一段实际是说，在伊拉克作战美军士兵很渴望能缴获伊军装备的D.F7x40望远镜。

It is no surprise to find the NVA DF at the end of this competition. It is only single-coated, and its light transmission is specified as 75%, whereas a modern binocular like the Swarovski Habicht can pass between 90% and 95% of the incident light.

NVA DF排在最后并不令人惊讶，它是单层镀膜，它的透光率标注是75%，而现代望远镜如Habicht能通过入射光的90%——95%。

The object glass of a telescope must be accurately centred.

望远镜的物镜必须精确置于中心上。

In this paper, we used the object and eyepiece lens of refracting telescope for instance, at first we conferred the optical system design analyze, and emended the and try to get better optical quality.

本论文以折射式望远镜的物镜及目镜为例，首先探讨光学系统，并修正镜片的设计分析，尝试得到较佳的光学品质。

A mirror, lens, or combination of lenses used to gather light and direct it upon an object or through a projection lens .

透镜含一个或多个透镜，用于辅助视力的一种工具，如单片眼镜或小望远镜

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。