Episode Details

In today's image, we see the spiral galaxy known as M51. In this image, the spiral arms have been digitally modified to unwind them using logarithms. The ordinary spiral arms form a logarithmic spiral which can be unwound digitally giving the ams a straight line appearance.

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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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