Some astronomers belive that at the beginning of the universe was a time when many galixies would be visible to the naked eye because the universe was more condesed than it is at the present d ay. In the centers of many galixes would be radiant objects that looked alike(p) stars but seemed brighter than all the stars in its galixiy. Astronomers call these objects quasars andbelive their presence to be more plentoful during the eairly formation of the universe. The quasars seen today are billions of light geezerhood away indicating that they have already come and gone and they no longer exist. A massive collision is a verisimilar process in which q...If you want to get a decent essay, order it on our website: OrderCustomPaper.com
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