Fayl:The long goodbye.jpg — Vikipediya

Fayl:The long goodbye.jpg

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English: A dying star’s final moments are captured in this image from the NASA/ESA Hubble Space Telescope. The death throes of this star may only last mere moments on a cosmological timescale, but this star’s demise is still quite lengthy by our standards, lasting tens of thousands of years!

The star’s agony has culminated in a wonderful planetary nebula known as NGC 6565, a cloud of gas that was ejected from the star after strong stellar winds pushed the star’s outer layers away into space. Once enough material was ejected, the star’s luminous core was exposed and it began to produce ultraviolet radiation, exciting the surrounding gas to varying degrees and causing it to radiate in an attractive array of colours. These same colours can be seen in the famous and impressive Ring Nebula (heic1310), a prominent example of a nebula like this one.

Planetary nebulae are illuminated for around 10 000 years before the central star begins to cool and shrink to become a white dwarf. When this happens, the star’s light drastically diminishes and ceases to excite the surrounding gas, so the nebula fades from view.

A version of this image was entered into the Hubble’s Hidden Treasures basic image competition by contestant Matej Novak.
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Mənbə http://www.spacetelescope.org/images/potw1530a/
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ESA/Hubble & NASA

Acknowledgement: M. Novak

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 ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
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27 iyul 2015

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hal-hazırkı09:09, 27 iyul 201509:09, 27 iyul 2015 tarixindəki versiyanın miniatür görüntüsü1.280 × 936 (145 KB)JmencisomUser created page with UploadWizard

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