Cosmology early universe theory

How did the universe began theories?
The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded.
Most astronomers use the Big Bang theory to explain how the universe began.
But what caused this explosion in the first place is still a mystery..
What is cosmology as the study of how the universe began?
Cosmology is a branch of astronomy that involves the origin and evolution of the universe, from the Big Bang to today and on into the future.
According to NASA, the definition of cosmology is "the scientific study of the large scale properties of the universe as a whole.".
What is early universe cosmology?
Until around a few hundred million years or so after the Big Bang, the universe was a very dark place.
There were no stars, and there were no galaxies.
After the Big Bang, the universe was like a hot soup of particles (i.e. protons, neutrons, and electrons)..
What was the early universe in cosmology?
The early universe was so hot, that as it has expanded and cooled, the highly energetic photons from that time have had their wavelengths stretched tremendously.
The cosmic microwave background we observe today is evidence of what the early universe was like..
The best-supported theory of our universe's origin centers on an event known as the big bang.
This theory was born of the observation that other galaxies are moving away from our own at great speed in all directions, as if they had all been propelled by an ancient explosive force.

The Early Years Until roughly 380,000 years after the Big Bang, the entire universe was a thick opaque cloud of plasma of electrons and nuclei. As the universe expanded, it cooled off enough to let the plasma become atoms, and the cosmos became transparent.

Until roughly 380,000 years after the Big Bang, the entire universe was a thick opaque cloud of plasma of electrons and nuclei. As the universe expanded, it cooled off enough to let the plasma become atoms, and the cosmos became transparent. We observe the light from this time as the cosmic microwave background (CMB).

How did scientists study the early universe?

Center for Astrophysics | Harvard & Smithsonian scientists study the early universe in a variety of ways:

Hunting for signs of inflation using the twisting of CMB light called polarization.
Even though this hypothetical rapid expansion of the universe happened a split-second after the Big Bang, it would have left observable traces behind.

Why do scientists study the early epochs of cosmic history?

Despite those problems, the early epochs of cosmic history are essential for everything that came after, leading researchers to find ways to figure out exactly what happened when our universe was in its infancy.
Center for Astrophysics | Harvard & Smithsonian scientists study the early universe in a variety of ways:.

Cosmology early universe theory

How did the universe began theories?

What is cosmology as the study of how the universe began?

What is early universe cosmology?

What was the early universe in cosmology?

How did scientists study the early universe?

Why do scientists study the early epochs of cosmic history?