In the beginning there was the singularity and time knew it not. Thereafter, the Planck Era was in full swing and time and nucleosynthesis began, the arrow of time choosing arbitrarily to move in a forward direction. The Force, which was all one, broke in symmetry and the four forces, gravity, electromagnetism, and the strong and weak nuclear forces, went on their merry separate ways. Two up quarks and one down quark, with the help of a gluon or two, became a proton, ionized hydrogen plasma, and all was frenzy in the quark soup of our 1/2 second-old universe. Photons were emitted and immediately recaptured, and in the beginning it was dark, dark, dark, for about 100,000 earth years, and the light knew it not. When things finally cooled down enough for photons to escape the primordial black ball, there was light, and it was good. A few decades ago this first light was detected here on earth by radiotelescopes and then by an orbiting satellite, and earth scientists called it the cosmic microwave background radiation, and it was good too.
After a few more hundred million years of expansion, the slight irregularities in the initial conditions caused matter and energy to clump together in some locations in the large scale structure of the universe, weaving wisps and filaments of galactic superclusters in the cosmic sponge, as Population-I stars went supernova, seeding the heavier elements necessary for Population-II stars to come into being, many surrounded by planetary nebulae which would eventually coalesce to planetissimals, and then to planets and moons around their host sun. Eventually, the first bits of pond scum evolved, and that was also good.
2007-06-28 06:19:06
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answer #2
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answered by Anonymous
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