KarelVreeburg wrote:I don't understand, You must be all qualified professionals,….. Seeing this Nebula and comparing it to others , this must be a Hour glass nebula. an ending system , not a planet forming system. Look carefully and you see the hour glass. In 3D it is huge more deep then wide. See and you know. It is dying, not forming (yet) Karel
Karel, yes, you're right about planetary nebulae (but wrong about the professional qualifications of many of the participants in this forum). The term "planetary nebula" was coined by William Herschel in the late 18th century. Herschel became an international rock star when he discovered the planet Uranus in 1781. Herschel's newfound fame and fortune went to his head and he started seeing Uranus-like objects
everywhere!
Uranus through an eight-inch aperture telescope
NGC7662, the Blue Snowball nebula, through an eight-inch aperture telescope
When Herschel saw nebulae that had bright roundish cores and more diffuse stuff around those cores, his wishful thinking led him to conclude that the diffuse stuff was condensing to form a new planet.
M27, the Dumbbell nebula, through a 14-inch telescope
Fortunately the scientific method gives us the opportunity to question and test previous assumptions, and over the past 200 years we have developed a much better understanding of what these odd-looking things are and how they form.
Regarding Starship Asterisk, some of our most active participants are professional scientists or engineers. But many of us are only interested amateurs. And some of us just like to look at pretty pictures and learn new things about the universe.
[quote="KarelVreeburg"]I don't understand, You must be all qualified professionals,….. Seeing this Nebula and comparing it to others , this must be a Hour glass nebula. an ending system , not a planet forming system. Look carefully and you see the hour glass. In 3D it is huge more deep then wide. See and you know. It is dying, not forming (yet) Karel[/quote]
Karel, yes, you're right about planetary nebulae (but wrong about the professional qualifications of many of the participants in this forum). The term "planetary nebula" was coined by William Herschel in the late 18th century. Herschel became an international rock star when he discovered the planet Uranus in 1781. Herschel's newfound fame and fortune went to his head and he started seeing Uranus-like objects [b][i]everywhere![/i][/b]
[img]http://www.starrynight.com/sntimes/wwwgfx-sn/month-2005-08/uranus2.jpg[/img]
Uranus through an eight-inch aperture telescope
[img]http://mvas.org/files/images/NGC7662%20(9-10-2012)-2j.preview.jpg[/img]
NGC7662, the Blue Snowball nebula, through an eight-inch aperture telescope
When Herschel saw nebulae that had bright roundish cores and more diffuse stuff around those cores, his wishful thinking led him to conclude that the diffuse stuff was condensing to form a new planet.
[img]http://www.roystarman.com/m27_small.jpg[/img]
M27, the Dumbbell nebula, through a 14-inch telescope
Fortunately the scientific method gives us the opportunity to question and test previous assumptions, and over the past 200 years we have developed a much better understanding of what these odd-looking things are and how they form.
Regarding Starship Asterisk, some of our most active participants are professional scientists or engineers. But many of us are only interested amateurs. And some of us just like to look at pretty pictures and learn new things about the universe.