the universe

Posted by johnwaisman on January 30, 2013 at 8:35 PM

The universe is a glorious place. Light travels at 186,000 miles per second, and it takes light 200,000 years to cross our galaxy. Most galaxies are approximately the same size. There are clusters of galaxies. There are clusters of clusters of galaxies, known as super clusters. The distance between galaxies is much greater than the distance across galaxies. Each galaxy contains hundreds of billions of stars. There are hundreds of billions of galaxies. The distance across the known universe is about 14.5 billion light years – that is it takes light about 14.5 billion years to cross the known universe.


But wait, this gets better. Scientists now predict there may be universes right new to ours. This is based on evidence that the 6 percent background heat (6 degrees above absolute zero) varies at the borders of the known universe. If there are neighboring universes, some scientists predict that there may be billions of other universes.


And the big question: Drum roll please - if there were no sentient beings in the universe, that is, no one to recognize how great all this is, would the universe still be a glorious place?



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