Episode Details

In today's image, we see recently discovered blue arcs near the Andromeda Galaxy in the sky. These arcs have been found to be a new class of object known as a Ghost Planetary Nebula. This is an older planetary nebula where much f the material is no longer glowing, except for some parts in the blu arc and some of the red glow of hydrogen here.

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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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