... But this well-studied example of a planetarynebula , produced near the end of the life of a sun-like star, is now understood ... The spoke features seem to indicate that the Helix Nebula is itself an old and evolved planetarynebula. ...
... Explanation: The Dumbbell Nebula is a beautiful red and blue planetarynebula in the constellation of Vulpecula. ... The term planetarynebula, used to describe this general class of objects, is misleading. ...
... Nebula (NGC 7293), a well studied and nearby example of a PlanetaryNebula , typical of this final phase of stellar evolution ... The white dot at the Helix's center is this PlanetaryNebula's hot, central star . ...
... Nebula (NGC 7293), a well studied and nearby example of a PlanetaryNebula , typical of this final phase of stellar evolution ... The white dot at the Helix's center is this PlanetaryNebula's hot, central star . ...
... Explanation: The layers of the Saturn Nebula give a complex picture of how this planetarynebula was created. ... Tomorrow's picture: NGC 5307: A Symmetric PlanetaryNebula . < Archive | Index | Search | ...
... Nebula (NGC 7293), a well studied and nearby example of a PlanetaryNebula , typical of this final phase of stellar evolution ... The white dot at the Helix's center is this PlanetaryNebula's hot, central star . ...
... NGC 2264 shown; see also the Horsehead Nebula ) Planetary nebulae are shells of gas ... Our Sun will probably produce a planetarynebula in about 5 billion years. ... A typical planetarynebula is less than one light-year across. ...