In today's image, we see the supernova remnant known as Cassiopeia A. This would have been seen to explode here on Earth about 350 years ago. However, it was not clearly seen, possibly because of excess dust between us and the supernova.

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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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