Alternatives to the Big Bang Theory Explained (Infographic)

Nearly 14 billion years ago, there was nothing and nowhere. Then, due to a random fluctuation in a completely empty void, a universe exploded into existence. Something the size of a subatomic particle inflated to unimaginably huge size in a fraction of a second, driven apart by negative-pressure vacuum energy. Scientists call this theory for the origin of the universe the Big Bang.

What we call the "observable universe" (or the "Hubble Volume") is the spherical region, about 90 billion light-years in diameter, that is centered on any given observer. This is the only part of the universe in which light has had time to reach the observer in the 13.8 billion years since the universe began.

Since the universe's expansion is accelerating, objects are being dragged out of Earth's Hubble Volume and will become undetectable to humans of the future.




The Hubble Volume is more than 13.8 billion light-years in radius because the expansion of space has increased distances between objects faster than light can travel.


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