NGC 2818 // Xinran Li

seen from Canada

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seen from United Kingdom
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NGC 2818 // Xinran Li
Constellation Pyxis - NGC 2818
Dying Star within Open Cluster
NGC 2818, a planetary nebula in Pyxis, the Compass // Mirosław Stygar
NGC 2818 // Brandon Pimenta
by WikiImages on Pixabay
Box number 10
Box number 10 is a hand painted brush box featuring the deep space object NGC 2818. Painted with Golden Acrylic on gessoed wood surface. Painting has been sealed for protection.
(NASA) Planetary Nebula NGC 2818 from Hubble Image Credit: NASA, ESA, Hubble Heritage Team (STScI / AURA)
NGC 2818 is a beautiful planetary nebula, the gaseous shroud of a dying sun-like star. It could well offer a glimpse of the future that awaits our own Sun after spending another 5 billion years or so steadily using up hydrogen at its core, and then finally helium, as fuel for nuclear fusion. Curiously, NGC 2818 seems to lie within an open star cluster, NGC 2818A, that is some 10,000 light-years distant toward the southern constellation Pyxis (the Compass). At the distance of the star cluster, the nebula would be about 4 light-years across. But accurate velocity measurements show that the nebula's own velocity is very different from the cluster's member stars. The result is strong evidence that NGC 2818 is only by chance found along the line of sight to the star cluster and so may not share the cluster's distance or age. The Hubble image is a composite of exposures through narrow-band filters, presenting emission from nitrogen, hydrogen, and oxygen atoms in the nebula as red, green, and blue hues.