Abell 39, una bolla cosmica - Abell 39, a cosmic bubble
Abell 39 è una nebulosa planetaria nella costellazione di Ercole: dista 7000 anni luce e ha una estensione di 5 anni luce.
Nebulose planetarie come questa si formano quando stelle simili al sole giungono al termine della loro vita e iniziano ad espellere gli strati esterni della loro atmosfera in un periodo di migliaia di anni.
La stella che ha generato Abell 39 è ancora visibile al centro della nebulosa e diventerà una caldissima nana bianca.
In questa immagine, ottenuta sotto cieli scuri, sono visibili parecchie remote galassie, alcune anche attraverso la nebulosa.
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Ghostly in appearance, Abell 39 is a remarkably simple, spherical nebula about five light-years across.
Well within our own Milky Way galaxy, the cosmic sphere is roughly 7,000 light-years distant toward the constellation Hercules.
Abell 39 is a planetary nebula, formed as a once sun-like star's outer atmosphere was expelled over a period of thousands of years. Still visible, the nebula's central star is evolving into a hot white dwarf. Although faint, the nebula's simple geometry has proven to be a boon to astronomers exploring the chemical abundances and life cycles of stars. In this image recorded under dark skies, very distant background galaxies can be found - some visible right through the nebula itself.
(text adapted from APOD)
Technical data
GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted RGB and OIII 5nm
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details:
OIII 40x600", R 24x300", G 23x300", B 23x300" all in bin3 -15C
gain 100
Total integration time: 12h30'
Acquisition: Voyager, PHD2
Processing: Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L: 21.00
Location: Promiod (Aosta Valley, Italy), own remote observatory
Date February/May 2023
Abell 39, una bolla cosmica - Abell 39, a cosmic bubble
Abell 39 è una nebulosa planetaria nella costellazione di Ercole: dista 7000 anni luce e ha una estensione di 5 anni luce.
Nebulose planetarie come questa si formano quando stelle simili al sole giungono al termine della loro vita e iniziano ad espellere gli strati esterni della loro atmosfera in un periodo di migliaia di anni.
La stella che ha generato Abell 39 è ancora visibile al centro della nebulosa e diventerà una caldissima nana bianca.
In questa immagine, ottenuta sotto cieli scuri, sono visibili parecchie remote galassie, alcune anche attraverso la nebulosa.
----------
Ghostly in appearance, Abell 39 is a remarkably simple, spherical nebula about five light-years across.
Well within our own Milky Way galaxy, the cosmic sphere is roughly 7,000 light-years distant toward the constellation Hercules.
Abell 39 is a planetary nebula, formed as a once sun-like star's outer atmosphere was expelled over a period of thousands of years. Still visible, the nebula's central star is evolving into a hot white dwarf. Although faint, the nebula's simple geometry has proven to be a boon to astronomers exploring the chemical abundances and life cycles of stars. In this image recorded under dark skies, very distant background galaxies can be found - some visible right through the nebula itself.
(text adapted from APOD)
Technical data
GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted RGB and OIII 5nm
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details:
OIII 40x600", R 24x300", G 23x300", B 23x300" all in bin3 -15C
gain 100
Total integration time: 12h30'
Acquisition: Voyager, PHD2
Processing: Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L: 21.00
Location: Promiod (Aosta Valley, Italy), own remote observatory
Date February/May 2023