If you are a professional or amateur astronomer and you've ever had an image of the sky whose location you did not precisely know, astrometry.net is for you. Input an image and we'll give you back precise coordinates (“astrometry”) for every pixel, plus lists of known objects falling inside the field of view.

不论你是一名天文工作者还是一名业余的天文爱好者，如果你有一张天空的照片，但你并不能确定其准确位置。astrometry.net可以告诉你。
上传你的照片，astrometry.net可以给出每一个像素的准确坐标。

We have built this astrometry service to create correct, standards-compliant astrometric meta data for every useful astronomical image ever taken, past and future, in any state of archival disarray. We hope this will help organize, annotate and make searchable all the world's astronomical information.