In today's image, we see the region around the bright star Gamma Cas, one of the brighter stars in the constellation of Cassiopeia. The red glow in an emission nebula caused by emission from hydrogen gas excited by the ultraviolet light from the star. The blue is reflection of the light off of dust grains in the nebula.

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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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