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| User galleriesThis category contains albums that belong to Coppermine users. |
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| 132 files in 12 albums and 1 categories with 0 comments viewed 87,895 times |
 Random files |
galaxiesdone.jpgUnknown.529 viewsJust a picture of some galaxies.Martin
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etacrop.jpgEta Carinae nebula.655 viewsThis stellar system is currently one of the most massive that can be studied in great detail. Until recently, Eta Carinae was thought to be the most massive single star, but it was recently demoted to a binary system.[7] The most massive star in the Eta Carinae multiple star system has more than 100 times the mass of the Sun. Other known massive stars are more luminous and more massive.
Stars in the mass class of Eta Carinae, with more than 100 times the mass of the Sun, produce more than a million times as much light as the Sun. They are quite rare — only a few dozen in a galaxy as big as the Milky Way. They are assumed to approach (or potentially exceed) the Eddington limit, i.e., the outward pressure of their radiation is almost strong enough to counteract gravity. Stars that are more than 120 solar masses exceed the theoretical Eddington limit, and their gravity is barely strong enough to hold in their radiation and gas.
Eta Carinae's chief significance for astrophysics is based on its giant eruption or supernova impostor event, which was observed around 1843. In a few years, Eta Carinae produced almost as much visible light as a supernova explosion, but it survived. Other supernova impostors have been seen in other galaxies, for example the false supernovae SN 1961v in NGC 1058[8] and SN 2006jc in UGC 4904,[9] which produced a false supernova, noted in October 2004. Significantly, SN 2006jc was destroyed in a supernova explosion two years later, observed on October 9, 2006.[10] The supernova impostor phenomenon may represent a surface instability[11] or a failed supernova. Eta Carinae's giant eruption was the prototype for this phenomenon, and after nearly 170 years the star's internal structure has not fully recovered.Martin
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Eta_Carina.jpgEta Carinae658 viewstest image with OAG.Martin
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IMG_0517.jpgARB Kev826 viewsARB Kev.Martin
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IMG_0518.jpgnice view749 viewsnice viewMartinMay 21, 2016
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IMG_0517.jpgARB Kev826 viewsARB Kev.MartinMay 21, 2016
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IMG_0516.jpg396 viewsKev's CarMartinMay 21, 2016
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IMG_0515.jpg403 viewsJacki and carMartinMay 21, 2016
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IMG_0514.jpg407 viewsAlex's carMartinMay 21, 2016
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IMG_0513.jpg407 viewsScotty's carMartinMay 21, 2016
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IMG_0512.jpg412 viewsMark beside his carMartinMay 21, 2016
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IMG_0511.jpg403 viewsHang this in the ceiling and Mark will be out of business :PMartinMay 21, 2016
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