Topic 1: Different Hypotheses on the Origin of the Universe
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9 Terms
The Evolutionary Theory
Density of matter decreases over time.
The Evolutionary Theory
Initial collection of hot particles exploded at the dawn of time; the universe is expanding.
The Steady State Theory
Density of matter is constant over time.
The Steady State Theory
The Universe forever looks much like it does today.
The Steady State Theory
No beginning or end of the universe
The Eternal Inflation Theory
The universe is continuously making other universes (multiverse) that may be or may not be different to our own in terms of physical laws.
Model of an Oscillating Universe
A possible singularity may cause a similar contraction (the Big Crunch) when the universe has reached its maximum expansion.
Model of an Oscillating Universe
Modification of the Big Bang theory, in which an expanding universe eventually reverses and collapses back to a Big Crunch before starting to expand again, forming one cycle of an endless series.
Model of an Oscillating Universe
Each cycle has a finite duration but the universe itself can last for an infinite time. It is not known whether our Universe is of this type, or whether it will expand forever.