File:NGC 6781 (noao-n6781blocks).tiff

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Original file (1,310 × 883 pixels, file size: 1.68 MB, MIME type: image/tiff)

Captions

Captions

This is an almost a perfect bubble of gas cast off by a single star that has died. The bubble continues to expand; it is approximately two light years across now. Its imperfection (from our perspective) is due to photodissociation (yes..

Summary

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Description
English: This is an almost a perfect bubble of gas cast off by a single star that has died. The bubble continues to expand; it is approximately two light years across now. Its imperfection (from our perspective) is due to photodissociation (yes... this is a real word) by interstellar UV radiation. Energetic photons from nearby bright stars decompose the gas bubble. Note the dim central blue star (a blue/white white dwarf).This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014.
Date 22 June 2014, 06:27:00 (upload date)
Source NGC 6781
Author KPNO/NOIRLab/NSF/AURA/Adam Block
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current17:11, 23 October 2023Thumbnail for version as of 17:11, 23 October 20231,310 × 883 (1.68 MB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/original/noao-n6781blocks.tif via Commons:Spacemedia

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