Comet Holmes has an orbit between Mars and Jupiter and can be seen about every seven years as a very faint object in the sky.

霍姆斯彗星的轨道在火星和木星之间，大约每隔七年便可在天空中见到这颗暗淡的彗星。

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All of these are useful for selection of technical scheme and engineering design of this kind of wavefront sensor operated with faint object.

此研究结果对弱光哈特曼-夏克波前传感器的技术方案选定和工程设计有指导意义。

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Astrometrica can also be used to stack a number of images, adding up the signal of a faint object.

本软件也可用于叠加图片来增加暗弱目标的信号强度。

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To observe such a distant, faint object, scientists had to collect light through the telescopes over 37 hours, letting more and more light accumulate to see as deep as possible.

MSN: Newfound galaxy may be most distant ever seen

Whichever turns out to be right (if either does), the new object must be very faint, otherwise it would have been spotted already.

ECONOMIST: X marks the spot