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Moon photograph by Gregory H. Revera, CC BY-SA 3.0. Planet positions are drawn for 40° north at civil twilight.

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The Lagoon Nebula Object of the day · October 01The Lagoon Nebula

A naked-eye star factory in the heart of the Milky Way's summer band.

The Lagoon (M8), roughly 4,100 light-years toward Sagittarius, is one of only two star-forming nebulae faintly visible to northern naked eyes. It spans over a hundred light-years, split by the dark channel that earned its name, and its core hides the…

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Photograph: GSFC / NASA Image Library

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