In today's image, we see the region known as Ou4, a relatively recently discovered nebula, seen in the blue light here, signifying the emission of oxygen atoms that have been ionized twice.

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This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.

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