Big Bang and Nucleosynthesis
When cosmic inflation stopped, the energy driving it transferred to matter and light – the big bang.
One second after the big bang, the universe consisted of an extremely hot (18 billion degrees Fahrenheit or 10 billion degrees Celsius) primordial soup of light and particles.
In the following minutes, an era called nucleosynthesis, protons and neut.
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Cosmic Inflation
Around 13.8 billion years ago, the universe expanded faster than the speed of light for a fraction of a second, a period called cosmic inflation.
Scientists aren’t sure what came before inflation or what powered it.
It’s possible that energy during this period was just part of the fabric of space-time.
Cosmologists think inflation explains many asp.
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Dark Ages
After the cosmic microwave background, the universe again became opaque at shorter wavelengths due to the absorbing effects of all those hydrogen atoms.
For the next 200 million years the universe remained dark.
There were no stars to shine.
The cosmos at this point consisted of a sea of hydrogen atoms, helium, and trace amounts of heavier elements.
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First Stars
Gas was not uniformly distributed throughout the universe.
Cooler areas of space were lumpier, with denser clouds of gas.
As these clumps grew more massive, their gravity attracted additional matter.
As they became denser, and more compact, the centers of these clumps became hotter – hot enough eventually that nuclear fusion occurred in their cente.
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How does a space mission measure cosmic acceleration?
The mission will also probe cosmic acceleration by measuring the masses and redshifts of galaxy clusters, the largest structures in the universe.
The number and size of these structures depend on how the speed of the universe’s expansion changes.
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Recombination
Around 380,000 years after the big bang, the universe had cooled enough that atomic nuclei could capture electrons, a period astronomers call the epoch of recombination.
This had two major effects on the cosmos.
First, with most electrons now bound into atoms, there were no longer enough free ones to completely scatter light, and the cosmic fog cle.
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Reionization
At first, starlight couldn’t travel far because it was scattered by the relatively dense gas surrounding the first stars.
Gradually, the ultraviolet light emitted by these stars broke down, or ionized, hydrogen atoms in the gas into their constituent electrons and protons.
As this reionization progressed, starlight traveled farther, breaking up mor.
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The Universe’S History
The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries.
New ideas and major discoveries made during the 20th century transformed cosmology – the term for the way we conceptualize and study the universe – although much remains unknown.
Here is the history of the universe according to cosmologists’ cu.
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What is cosmology physics?
The Cosmos Our quest to understand how the universe works starts with the study of the very basic building blocks of our existence – matter, energy, space, and time – and how they behave under the extreme physical conditions that characterize the infant and evolving Universe.
The Physics of the Cosmos (PCOS) program incorporates cosmology, […] .
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What was the history of the universe based on cosmology?
Here is the history of the universe according to cosmologists’ current theories.
Around 13.8 billion years ago, the universe expanded faster than the speed of light for a fraction of a second, a period called cosmic inflation.
Scientists aren’t sure what came before inflation or what powered it.
