NOCTURNAL EMISSIONS In this image, NGC 6188, an emission nebula about 4,000 light-years away from Earth, is joined by another emission nebula, NGC 6164. (Photo: Kfir Simon via NASA APOD)
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NOCTURNAL EMISSIONS In this image, NGC 6188, an emission nebula about 4,000 light-years away from Earth, is joined by another emission nebula, NGC 6164. (Photo: Kfir Simon via NASA APOD)
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