In today's image, we see the Seagull Nebula. This is an example of an emission nebula showing the red glow of hydrogen gas which is caused by nearby stars emitting ultraviolet light which is energetic enough to excite the hydrogen atoms.

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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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