Nemesis or Death star is a so called brown dwarf star which will create havoc in 2012 or 2013, but could this really be true or just a bedtime story.
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What is Nemesis? Nemesis is a theoretical brown dwarf star which theoretically is part of our solar system. There are two Nemesis theories today and two brown dwarf star theories, as well.
What are brown dwarf stars? The most accepted theory on what brown dwarf stars are is as follow: Brown dwarf stars are celestial bodies that are too small to support continues hydrogen fusion. There for they have a very small light out put. Brown dwarfs stars are general smaller then small stars but bigger then the planet Jupiter. The second and not widely accepted theory is that brown dwarf stars are formed after a star has gone supernova. Supernova is when a star becomes unstable and explodes. Generally one of two things is created after a star has gone supernova, a black hole or a neutron star. A black hole is generally formed when a super giant star goes supernova. A neutron star is formed when a smaller star goes supernova. The theory behind this brown dwarf star is that after the supernova a neutron star was formed, this neutron star pulled most of the material back towards its surface and started to reconstruct it self. Because of the neutron stars strong gravitational pull and high density, the star remains small and very little of the light and heat escapes the star. This may explain why NASA could only find two brown stars orbiting normal stars while they found hundreds more brown dwarf stars orbiting each other.
What are the Nemesis theories? There are two Nemesis theories. The one theory says that Nemesis is a brown dwarf star orbiting our sun and every 26milion years it passes though the Oort cloud. This passing could lead to comets hitting the earth every 26million years. However no evidence of comet hits every 26million years has been found in the fossil record. However a dwarf brown star could be orbiting our solar system since this seems the help explain the very irregular orbits of the dwarf planets Eris and Sedna. Finding this dwarf brown star however is not as easy as it sounds, because brown dwarf stars are dark objects and there is a vast area of space that needs to be explored. The second theory on Nemesis says that the brown dwarf star is not orbiting us but we are orbiting it, with an elongate orbit of 26million years. If this theory is true we should be able to find Nemesis by look for is just below and just above our current direction of movement in space. If the theory proofs to be correct it would be able to explain why extinction events take place every 26million years and it will conclusively proof that we move up and down in the Milky Way and not over the Milky Way as some mite suggest. Nemesis according to this theory can create extinction events in a number of ways. These ways include, comet and asteroid strikes, gamma ray bursts, climate change (either warming or cooling depending on earths location in accordance with Nemesis and the sun), pole shifts ( If earth finds it self between the two stars), orbit shifts and extreme seismic activity. All of these methods will depend on where earth is in relation to the sun and Nemesis and how stable Nemesis is during the fly by. Spotting Nemesis could be hinder by the gas cloud we are currently entering if this gas cloud is not part of the Nemesis system it self. For more on climate change click here Climate change
The rating
Will Nemesis create chaos in 2012?
Rating: Theoretical
Reason for rating: Nemesis has not been found as yet.
For more information on Nemesis click here
Compiled by
J.H Theart and Tanit
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