Tuesday, May 13, 2008

More of the Matter


Astronomers have just recently discovered new material that will further help explain how the universe works. What they have found is material that is extremely hot, dense and invisible to us, but is not what is known as dark matter. In trying to balance the amount of matter in the universe astronomers can only account for 10 percent of it, the other 90 percent is still hidden to us. The matter that is in the universe that is visible to us that we know makes of the stars, galaxies, planets and everything on them is known and Baryonic matter and only account for 4 percent of the matter in the universe. Astronomers believe that the rest of universe is made up of dark matter which is roughly 21 percent, which has still not been discovered but plays a very important role in the formation of the galaxies after the Big Band. There is also an even more mysterious dark matter that accounts for 75 percent of the universe which caused the accelerated expansion of the universe. Before this discovery Baryonic matter in the universe was accounted for by known gas, stars and galaxies. The missing Baryonic matter as well as dark matter is believed to be a kind of giant spider web that connects galaxy clusters, which sit on threads on knots in the web. This is though to be a extremely hot, ultra thin gas haze of very low density that sits between larger structures and only emits light in the far ultraviolet and x-ray because of its temperature. Astronomers could only see the very dense knots of the web before, but are now seeing the thin connecting wires. This Baryonic has is roughly 150 times hotter than the suns surface and was indirectly detected through the Milky Way and connects about a dozen other galaxies within the local group. This is the stiff that is though to not have fallen in to the galaxies when they first formed, but Finding and analyzing these filaments could help astronomers better understand what happened after the Big Bang and what forces are dominating the universe today.

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