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首页星系壁纸 A Spiral Galaxy is Visited by a Trojan War Hero

A Spiral Galaxy is Visited by a Trojan War Hero

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by NASA/JPL-Caltech/UCLA

NASA Image Library · 公有领域（Public Domain）

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Galaxy Messier 74, with its spiral arms seen face-on, is in the center of this image captured by NASA Wide-field Infrared Survey Explorer, or WISE, while an asteroid tracks its way across the sky.

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