Nearly 14 billion years ago, the universe began with a random fluctuation in a completely empty void. Scientists call this theory for the origin of the universe the Big Bang. But, is there an alternative theory? Take a look…
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The observable universe is the spherical region about 90 billion light-years in diameter, that is centred on Earth. The universe continues infinitely outside of Earth’s observable universe.
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Astronomers rely on both theory and observation to make three key assumptions about the universe.
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In addition to these assumptions, the universe exhibits several key properties that have been observed. One of the observation is that the universe emerged from a hot, dense state at a finite point in the past.
The first elements created in the universe were hydrogen and helium.
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Some of the alternative theories include Eternal Inflation, according to which, after the Big Bang, the universe rapidly expanded during a brief period called inflation, and this expansion never stopped.
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The Oscillating University theory suggests that the universe goes through an endless cycle of Big Bangs followed by Big Crunches that restart the cycle.
