After the Big Bang Which of the Following Occurred First

The fusion reactions made most of the remaining 25 as helium-4. The Big Bang theory is the prevailing cosmological model explaining the existence of the observable universe from the earliest known periods through its subsequent large-scale evolution.

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Protons and neutrons fused together to form deuterium and eventually helium.

. The first stars created bigger atoms and groups of atoms. It is 10-15 seconds or one quadrillionth of a second. The first period of time immediately after the Big Bang is known as the Planck epoch which occurred during the first 10 -43 seconds after it.

Photons outnumbered matter particles but the universe was too dense for light to shine within it. This by the way defies the universally accepted axiom that nothing can travel faster than the speed of light when it is quite obvious the first expansion of the universe did exactly that. The first as we have already mentioned is that the universe cools as it expands.

During the history of the universe what important event occurred about 380000 years after the Big Bang. Right after the big bang the universe expanded in a millionth of a second to half the size it is today. Light began to travel freely through the universe.

The contemporary explanation of the big bang states that early profound changes happened incredibly fast sometimes in fractions of a second at multibillion-degree temperatures. 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. Which of the following important events occurred earliest in the history of the universe.

Little is known about this period because our current physical theories cannot probe smaller timescales than this. Forces of physics were unified. A femtosecond is to a second as a.

Before stating what happened in the first few minutes it is necessary to examine what occurred in the first femtosecond. Present observations suggest that the first stars formed from clouds of gas around 150200 million years after the Big Bang. Our Sun is a late-generation star incorporating the debris from many generations of earlier stars and it and the Solar System around it form roughly 45 to 5 billion years ago 85 to 9 billion years after the Big Bang.

Right after the Big Bang the universe was a hot soup of particles. It took about 380000 years to cool enough that the particles could form atoms then stars and galaxies. Youd notice that the Inflation epoch is marked in the diagram in.

Inflation came first and its end heralded the arrival of the Big Bang. The expansion of the universe and recycling of star materials into new stars continues. Spacetime rapidly expanded during a brief period of inflation.

Over lots of time atoms came together to form stars and galaxies. Asked Sep 11 2020 in Physics Space Science by Kriss21. The Universe was a very hot and dense soup of sub-atomic particles after the Big Bang.

Matter and anti-matter were created by colliding photons. According to the theories of physics if we were to look at the Universe one second after the Big Bang what we would see is a 10-billion degree sea of neutrons protons electrons anti-electrons positrons photons and neutrinos. As everything expanded and took up more space it cooled down.

There are still those who disagree but theyre now nearly a full 40 years out. Heavier atoms such as carbon oxygen and iron have since been continuously produced in the hearts of stars and catapulted throughout the universe in spectacular stellar explosions called supernovae. Next came the period of standard cosmology which begins 01 second after the beginning of the big bang.

Lets start with the first few minutes following the Big Bang. Three basic ideas hold the key to tracing the changes that occurred during the time just after the universe began. Answer 1 of 9.

Its often said that in its earliest moments the universe was in a hot dense state. It expanded rapidly by several orders of magnitude 1060 in a very short period of time within 10-30 seconds owing to Inflation. But early on for the first 10000 years after the Big Bang or so radiation was the dominant component of the Universe and arguably the only one that mattered.

For the starters Big Bang happened everywhere. Until about 380000 years from the Big Bang expansion and cooling continued to just above 4000 K the universe now consisted of. Figure 2913 shows how the temperature changes with the passage of time.

The first elements hydrogen and helium couldnt form until the universe had cooled enough to allow their nuclei to capture electrons right about 380000 years after. Today 137 billion years. During the history of the universe what important even occurred about 380000 years after the Big Bang.

The first expansion. Then those atoms grouped together. That led to more stars being born.

Essentially all the hydrogen nuclei that will ever exist in our universe were created __________. From this moment on scientists feel they have a pretty good handle on how the universe evolved. Much smaller amounts on the order of 001 were made of deuterium and helium-3.

The tiny particles grouped together. What Happened Moments After the Big Bang. What is a femtosecond.

QUESTION 5 The following events all occurred in the first few minutes after the Big Bang Arrange them in the order in which they occurred.

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