This weeks apod is based of the photo of the Halo of the Cat's Eye. This amazing photo was taken by the Nordic Optical Telescope. This nebula is one of the best known nebulae in the sky today. There is symmetries that are seen in the central region of this photo. Keep in mind however, that this photo is false-colored in order for you to grasp the details and amazing aspects of this nebula. The false-colors also reveal the faint halo that spans over three light-years across.It is very common for the planetary nebula phase to be thought to last for around 10,000 years, astronomers estimate the age of the outer filamentary portions of this halo is about 50,000 to 90,000 years. This photo still amazes me, and the gaseous halo is extremely photogenic.
http://apod.nasa.gov/apod/image/1005/catseye2_not_big.jpg
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