At the estimated distance of the Iris Nebula this remarkable wide field view is over 30 light-years across.

以鸢尾花星云的距离推算，这张宽幅图片的跨度超过了30光年。

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At the estimated distance of the Iris Nebula this remarkable wide field view is over 30 light-years across.

以鸢尾花星云的距离推算，这张宽幅图片的跨度超过了30光年。

youdao