In today's image, we see the galaxy known as M94. This is an example of a ring galaxy which is a relatively unusual type of galaxy. While we know of a tremendous number of galaxy's, the number of ring galaxies is small. The inner ring may have been caused by a recent burst of star formation, but the reason for the outer ring is not currently known.

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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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