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- NGC_6826 abstract "NGC 6826 (also known as Caldwell 15) is a planetary nebula located in the constellation Cygnus. It is commonly referred to as the "blinking planetary", although many other nebulae exhibit such "blinking". When viewed through a small telescope, the brightness of the central star overwhelms the eye when viewed directly, obscuring the surrounding nebula. However, it can be viewed well in the peripheral vision (averted vision), which causes it to "blink" in and out of view as the observer's eye wanders. A distinctive feature of this nebula are the two bright patches on either side, which are known as FLIERs, or Fast Low-Ionization Emission Regions. They appear to be relatively young, moving outwards at supersonic speeds. According to Bruce Balick (University of Washington), "some of their observed characteristics suggest that they are like sparks flung outward from the central star late in the very recent past (a thousand years ago). Yet their shapes ... seem to suggest that they are stationary, and that material ejected from the star flows past them, scraping gas from their surfaces. Future Hubble observations will monitor any changes in the positions of FLIERs to resolve this issue. In either case, the formation of FLIERs cannot be easily explained by any models of stellar evolution."".
- NGC_6826 thumbnail NGC_6826HSTFull.jpg?width=300.
- NGC_6826 wikiPageExternalLink opo9738d.html.
- NGC_6826 wikiPageID "10768106".
- NGC_6826 wikiPageRevisionID "544771519".
- NGC_6826 appmagV "8.8".
- NGC_6826 caption "A Hubble Space Telescope image of NGC 6826.".
- NGC_6826 caption "Credit: HST/NASA/ESA.".
- NGC_6826 constellation Cygnus_(constellation).
- NGC_6826 distLy "~2000 ly".
- NGC_6826 epoch Epoch_(astronomy).
- NGC_6826 hasPhotoCollection NGC_6826.
- NGC_6826 name "NGC 6826".
- NGC_6826 names "HD 186924, SAO 31951, Caldwell 15".
- NGC_6826 radiusLy "0.22".
- NGC_6826 sizeV "27".
- NGC_6826 subject Category:Caldwell_objects.
- NGC_6826 subject Category:NGC_objects.
- NGC_6826 subject Category:Planetary_nebulae.
- NGC_6826 comment "NGC 6826 (also known as Caldwell 15) is a planetary nebula located in the constellation Cygnus. It is commonly referred to as the "blinking planetary", although many other nebulae exhibit such "blinking". When viewed through a small telescope, the brightness of the central star overwhelms the eye when viewed directly, obscuring the surrounding nebula.".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "NGC 6826".
- NGC_6826 label "Мерцающая туманность".
- NGC_6826 label "眨眼星雲".
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs NGC_6826.
- NGC_6826 sameAs m.02qpdq3.
- NGC_6826 sameAs Q725474.
- NGC_6826 sameAs Q725474.
- NGC_6826 wasDerivedFrom NGC_6826?oldid=544771519.
- NGC_6826 depiction NGC_6826HSTFull.jpg.
- NGC_6826 isPrimaryTopicOf NGC_6826.