| HotLiquidMagma.com A Practical Guide to Astronomy |
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The Big Bang: |
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The Theory Stephen Hawking calculated that black holes emit quantum radiation. Based on Einstein's theory of bending light, Hawking was able to figure when enough mass is concentrated as in a large collapsing star, that curvature becomes extreme enough to prevent light from escaping- thus you have a large black hole.A black hole has a point of infinite density and zero size, called a "singularity". Hawking then theorized; by reversing time, using the black hole model, time must have had a beginning, a point in the past where time as we know it began; 10 to the -43 second. This is the point in time where we can not go any further back- the outer limit. |
| A History of the Universe in 4 Frames | |
 Phase 1: At the beginning of time, from complete nothingness, a cosmic explosion ignites. |
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Phase 3: Galaxies begin to take shape while still moving away from the initial point of ignition |
Phase 4: The universe continues to expand to this very day. |
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And Then What? There are two schools of thought regarding what will happen to our universe. Some scientists believe that the universe will continue to expand forever. Other scientists believe the universe may slow its expansion, reach a peak expansion distance, then begin to contract under the pressure of gravity, until we reach a "Big Crunch." |
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