Tuesday, October 25, 2011

Supernew stars

The supernew

Supernew stars – a version of the stars finishing the evolutionary process by catastrophic explosion of huge capacity. The term "supernew" has appeared as distinctive from the term "new" – so stars which flash with increase in visible luminosity in thousand times are called. Luminosity supernew on some usages above, than luminosity of the new. It is necessary to tell that these terms are faster historically developed concepts, than the definitions reflecting a real physical essence of process as in all cases stars which already exist flash. However in some cases flashes of stars which were not observed before have been fixed (i.e. were not visible to terrestrial observers for whatever reasons), creating effect of "birth" of a new star.
The phenomenon of the supernew accompanies the end of existence of a huge star. At process of burning of stars hydrogen is used; after "use" of all its stocks as nuclear fuel other, heavier elements start to "be used". When all elements, suitable for burning process come to an end, the star starts to lose the physical stability and is promptly compressed to the centre. Finally it leads to that the central part of a star will be transformed to superdense neutron weight, and the external part of a cover is dumped – this process and can be observed as occurrence of the supernew. However, it is only theoretical calculations of scientists in which there are many points at issue.
The huge star belonging to Big Magellanovomu to the Cloud which is a satellite galaxy of the Milky Way was brightest of supernew lately. This explosion observed in 1987, was well visible an unaided sight, without looking at all at that fact that the distance to this galaxy is great enough even on space scales – about 168 thousand light years.

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