What happened to the universe shortly after the Big Bang?

In the first moments after the Big Bang, the universe was extremely hot and dense. As the universe cooled, conditions became just right to give rise to the building blocks of matter – the quarks and electrons of which we are all made. As the universe continued to expand and cool, things began to happen more slowly.

What was the universe made of right after the Big Bang?

After the Big Bang, the universe was like a hot soup of particles (i.e. protons, neutrons, and electrons). When the universe started cooling, the protons and neutrons began combining into ionized atoms of hydrogen (and eventually some helium).

How many particles are in the universe?

If you use the methods I described above to figure out the density of ordinary matter in the universe, and you have a good estimate for the volume of the observable universe (about 4 x 1080 cubic metres), we get a value of about 1080 particles of ordinary matter in the universe.

How many particles are there in the observable universe?

Therefore the observable universe is defined as only the parts of the universe that are within 13.7 billion light years of us. The commonly accepted answer for the number of particles in the observable universe is 10 80. This number would include the total of the number of protons, neutrons, neutrinos and electrons.

What was the universe like after the Big Bang?

As space expanded, the universe cooled and matter formed. One second after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos. Related: What Is Big Bang Theory?

Is radiation the only thing that matters in the universe?

But early on, for the first ~10,000 years after the Big Bang or so, radiation was the dominant component of the Universe, and arguably, the only one that mattered. For most of the Universe’s history, these have been the only five components that mattered.

Is there a limit to the universe?

The Universe is out there, waiting for you to discover it. limits of what’s observable out to a distance of 46.1 billion light-years away. This view is only accessible to us today, 13.8 billion years after the start of the hot Big Bang. As we run the clock backwards, the Universe gets smaller, but there is a limit.