The universe expands from an unimaginably hot and Houston Astros Blooming Baseballs Shirt speck (perhaps a singularity) with all the known forces unified. In a tiny fraction of a second tremendous changes are unleased. The strong force separates from the electronuclear. The weak force then separates from the electromagnetic. ~1 microsecond into this process Quarks are confined within hadrons. 1 millisecond in hydrogen nuclei are formed. 1 second in neutrinos begin to interact with other particles. At about the 3 minute mark helium nuclei are formed. 379,000 years in, the plasma cools enough for stable atoms to form and photons are released from this veil forming the Cosmic Background Radiation we see today. It’s 100 million years before the first stars can form, many generations of stars are busy creating the heavy elements necessary for life as we know it from the process of fission (both during the life of the star and during nova, supernova, and stellar collisions including those of neutron stars). All of these things almost certainly had to happen before life could form. So that’s somewhere around 1 billion years later before there is likely to be a place that is hospitable to life as we know it. But that’s even before galaxies have formed so that may be way too early, we just don’t know for certain.
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As a galaxy forms, a random LGBT Bisexual be gay do crimes logo shirt of matter in space coalesces into a disk, or some other elongated and curved form. This process can be thought of akin to a ballet dancer tucking in her arms and legs as she spins, resulting in her spinning much faster. In classical mechanics, ignoring all relativistic effects and nonlinear terms, this can be described simply as follows. Moment of inertia, the quantity relating to how hard a force has to try to rotate an object, increases as an the matter becomes more central due to its own gravitational attraction. This, by conservation of energy, the angular velocity must increase proportional to the square root of the decrease in moment of inertia. All in all, this phenomenon happens in many ways right in front of you every day, however galaxies boast a much more grandiose scale than we are akin to conceptualizing.
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