数据来源于第谷星表，100光年以外的恒星则采用非常近似的数值。

This is taken from the Tycho catalog and for stars further away than 100 light years or so should be taken as a very approximate figure.

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软件将使用图片和星表中最亮的恒星进行匹配。

The software will use the brightest stars in the image and in the star catalogue for the matching routine.

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直到目前，对于CCD观测者唯一合适可用的星表是GSC(哈勃空间望远镜的引导星参考星表)，它包含1.8亿个目标(恒星和星系)。

Until quite recently, the only useable catalogue for CCD observers was the Hubble Space Telescope's Guide star catalogue (GSC), that contains about 18 million objects (stars and galaxies).

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