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How the Hubble Space Telescope Captured the Cosmos

The Cat's Eye Nebula, one of the first planetary nebulae discovered, also has one of the most complex forms known to this kind of nebula. Eleven rings, or shells, of gas make up the Cat's Eye

NGC 6302 (The Butterfly Nebula): With an estimated surface temperature of about 250,000 degrees C, the central star of this particular planetary nebula is exceptionally hot -- shining brightly in ultraviolet light but hidden from direct view by a dense torus of dust. This dramatically detailed close-up of the dying star's nebula was recorded by the newly upgraded Hubble Space Telescope. Credit: NASA, ESA, and the Hubble SM4 ERO Team

The Helix Nebula, lies 650 light-years away, in the constellation of Aquarius. It is a typical example of a class of objects called planetary nebula. Planetary nebulae are actually the remains of stars that once looked a lot like our sun. These stars spend most of their lives turning hydrogen into helium in massive runaway nuclear fusion reactions in their cores. In fact, this process of fusion provides all the light and heat that we get from our sun.

Remix Nebula ...So what is a nebula? It is a cloud of dust, hydrogen, helium and other gases that attract matter and materials to clump. These so called clumps form stars, planets, and other planetary systems. In simple, Nebulae are where the stars are formed! (Wikipedia)