by Ann » Thu Aug 29, 2019 6:53 am
zendae1 wrote: ↑Thu Aug 29, 2019 6:10 am
That is truly stunning. I like how it has such a depth of dimension quality to it.
Bob Franke is a truly great astrophotographer. All his pictures are stunning.
I'm normally not all that interested in planetary nebulas, but I have to admit that I'm intrigued by this one, thanks to the details and colors of Bob Franke's image. Note how twin jets seem to emanate from the tiny but scorchingly hot central star. The jets are reddish because they are "thicker" than their surroundings, i.e., they contain more mass. Most of the inner part of the nebula, by contrast, is blue-green from OIII emission, which is primarily found in very energetic and extremely "thin" (extremely near vaccuum) conditions. Reddish clumps of matter is mixed into the blue-green near-vaccuum. Everything is pretty sharply delineated as well as quite chaotic in the inner part of the nebula.
By contrast, the outer part of the nebula is surrounded by a sort of barrier, almost as if the inner nebula was a cosmic
baby in its amniotic sac. Outside this barrier the nabula is quite different and "soft".
Note that, apart from the twin jets emitted by the central star, the star also seems to have ejected two huge puffs of energy centered on about 11 o'clock and 5 o'clock. The inner wall of the "amniotic sac" is aglow with bright red nebulosity in these parts. The other parts of the inner wall, by contrast, seem "dormant".
Fascinating!
Ann
[quote=zendae1 post_id=294817 time=1567059021]
That is truly stunning. I like how it has such a depth of dimension quality to it.
[/quote]
Bob Franke is a truly great astrophotographer. All his pictures are stunning.
I'm normally not all that interested in planetary nebulas, but I have to admit that I'm intrigued by this one, thanks to the details and colors of Bob Franke's image. Note how twin jets seem to emanate from the tiny but scorchingly hot central star. The jets are reddish because they are "thicker" than their surroundings, i.e., they contain more mass. Most of the inner part of the nebula, by contrast, is blue-green from OIII emission, which is primarily found in very energetic and extremely "thin" (extremely near vaccuum) conditions. Reddish clumps of matter is mixed into the blue-green near-vaccuum. Everything is pretty sharply delineated as well as quite chaotic in the inner part of the nebula.
By contrast, the outer part of the nebula is surrounded by a sort of barrier, almost as if the inner nebula was a cosmic [url=https://images.medicaldaily.com/sites/medicaldaily.com/files/styles/headline/public/2013/08/04/0/58/5876.jpg]baby in its amniotic sac[/url]. Outside this barrier the nabula is quite different and "soft".
Note that, apart from the twin jets emitted by the central star, the star also seems to have ejected two huge puffs of energy centered on about 11 o'clock and 5 o'clock. The inner wall of the "amniotic sac" is aglow with bright red nebulosity in these parts. The other parts of the inner wall, by contrast, seem "dormant".
Fascinating!
Ann