File:A Planetary Nebula Gallery (9934101373).jpg

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Description: This gallery shows four planetary nebulas from the first systematic survey of such objects in the solar neighborhood made with NASA's Chandra X-ray Observatory. The planetary nebulas shown here are NGC 6543 (aka the Cat's Eye), NGC 7662, NGC 7009 and NGC 6826. X-ray emission from Chandra is colored purple and optical emission from the Hubble Space Telescope is colored red, green and blue. A planetary nebula is a phase of stellar evolution that the sun should experience several billion years from now, when it expands to become a red giant and then sheds most of its outer layers, leaving behind a hot core that contracts to form a dense white dwarf star. A wind from the hot core rams into the ejected atmosphere, creating the shell-like filamentary structures seen with optical telescopes. The diffuse X-ray emission is caused by shock waves as the wind collides with the ejected atmosphere. The properties of the X-ray point sources in the center of about half of the planetary nebulas suggest that many central stars responsible for ejecting planetary nebulas have companion stars.

Creator: Chandra X-ray Observatory Center

Date Created: 10/10/2012

Repository: Smithsonian Astrophysical Observatory

Image ID: pne

Permanent URL: chandra.harvard.edu/photo/2012/pne/

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Source A Planetary Nebula Gallery
Author Smithsonian Institution from United States
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(Reusing this file)		 Smithsonian Institution @ Flickr Commons

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This image was originally posted to Flickr by Smithsonian Institution at https://flickr.com/photos/25053835@N03/9934101373. It was reviewed on 14 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

14 September 2016

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current06:18, 14 September 2016Thumbnail for version as of 06:18, 14 September 20163,000 × 3,000 (3.85 MB)Vanished Account Byeznhpyxeuztibuo (talk | contribs)Transferred from Flickr via Flickr2Commons

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