LBV (luminous blue variables) or planetary nebula ?
Nebula by material ejection from a star, by different dynamics. LBV ejects material because is very massive and in the primordial stage of his life. The planetary ejects in death stage.
One ejects because of excess of material, other because it doesn't get process the nuclear fusion.
Quote:
Australia Telescope Compact Array wrote
Stars which start life more than 20 times more massive than the Sun will develop strong stellar winds. With speeds of more than 1000 km s-1, these winds carry off up to 90% of their star's initial mass. Such extreme mass loss clearly influences these stars' subsequent evolution: this is still not fully understood, but it is thought that a massive O-star evolves through a short-lived 'luminous blue variable' (LBV) stage, during which it ejects vast amounts of gas, to finally become a Wolf Rayet star.
http://www.atnf.csiro.au/news/result...adioStars.html
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A more true image of nebula:
http://www.atnf.csiro.au/news/results/AG_CAR_AT.GIF
GSO 305 mm - Canon T3 - 16 x 3 min (48 min) ISO 800 - Skyglow filter - OAG - Coma corrector
note: DSLRs cameras tend to produce images of stars as chubby star. For this object, the image of the central star is disproportionate, not suitable.
