Dark Stars
May 17th 2008 04:50
This artist's conception shows what an invisible "dark star
Dark Stars, sounds like a contradiction in terms but they still may exist.
They may be bigger in size than the orbit of Neptune at least as massive our Sun yet these ”stars” are invisible and powered by the tremendous force of dark matter. They were the first stars to form in a newborn universe; some of them may still be lurking in the vast expanse of our universe. Hard to believe that dark stars are so massive and yet give off no visible light It is surprising that they are even called stars at all.
Some physicists are reasonable sure that dark stars were the very first stars to evolve at the start of the universe. The birth of first generation of stars forming in a young universe is still a mystery. The theory is that these dark stars formed shortly after the big bang form pockets of small density primordial gas. These huge blobs were able to withstand the expanding universe. Scientists know dark matter exists because galaxies rotate faster than can be explained by the visible matter within them. Recent observations conducted by satellites and telescopes have led to the estimate that all visible matter represents only 4 percent of the universe, which also is made of 23 percent dark matter and 73 percent “dark energy” A type of unknown force helping the universe expand.
It is possible that gigantic dark stars may still exist today, and although they do not emit visible light, they could be detected because they should radiate gamma rays, neutrinos and antimatter and be associated with clouds of cold, molecular hydrogen gas that normally wouldn’t otherwise harbour such energetic particles. Dark stars would be difficult to detect but not impossible. Finding them by using gravitational (micro) lensing techniques. The gravity of dark star would bend the light from distant stars and galaxies in a very specific manner.
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