The Big Bang Theory

The Big Bang theory is the prevailing cosmological model for the observable universe from the earliest known periods through its subsequent large-scale evolution.

Origin

The model describes how the universe expanded from an initial state of high density and temperature, and offers a comprehensive explanation for a broad range of observed phenomena.

Expansion of the Universe

According to the Big Bang theory, the universe was in a hot dense state before it started expanding rapidly.

Aftermath

After the initial expansion, the universe cooled and continued to expand, allowing the first subatomic particles and simple atoms to form.

Current Understanding

Present observations suggest that this expansion is accelerating due to dark energy, and that most of the mass-energy in the universe is actually unknown dark matter.

Future

The future of the universe is still unknown due to various uncertainties in the measurements and the nature of dark matter and dark energy.