# size of the universe at the big bang

How Big Was The Universe At The Moment Of Its Creation?

Mar 24, 2017 · The diameter of the Milky Way is 100,000 light years; the observable Universe had this as its radius when it was approximately 3 years old. When the Universe was one year old, it was much hotter and denser than it is now. The mean temperature of the Universe was more than 2 million Kelvin.

Author: Ethan Siegel

Our Expanding Universe: Age, History & Other Facts

During the first three minutes of the universe, the light elements were born during a process known as Big Bang nucleosynthesis. Temperatures cooled from 100 nonillion (1032) Kelvin to 1 billion (109) Kelvin, and protons and neutrons collided to make deuterium, an isotope of hydrogen.

What was the size of the universe at the time of the big bang?

No conclusion can be made about the size of our Universe based on the fact of the Big Bang.

How big was the Universe at the moment of its creation?

But if we’re talking about the observable Universe, and we know we’re only able to access somewhere between the last 10^–30 and 10^–35 seconds of inflation before the Big Bang happens

Size Of Universe At Big Bang | Sciforums

Jan 30, 2009 · We can now solve for the thickness of our universe at big bang. The total radius of the universe will be: The thickness of our universe is: The universe at big bang is a layer 74 miles thick upon a radius of 284 miles from the common center.

Initial Size of Big Bang | Physics Forums

Mar 29, 2011 · A somewhat different question is the initial size of the *observable* universe. The current radius of the observable universe (i.e., the region of space from which light has had time to reach us since the Big Bang) is about 46 billion light years.

 Big bang singularity size | Physics Forums Apr 15, 2016 The size of the universe at the big bang? | Physics Forums Nov 24, 2012 Time from big bang / size of universe | Physics Forums Aug 04, 2011

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cosmology – Size of universe after inflation? – Physics

5 Answers. That happened 379,000 years after the big bang at a redshift of 1098 which means the universe was about 84.6 million light years in diameter which, per WolframAlpha, is about half the diameter of the local super cluster of galaxies or about 840 times the diameter of our galaxy.

How large was the universe at the moment of recombination

The “average density at the time” — assuming a constant Universe energy of ≈ 8.7×10^52 kg — comes out to ≈ 4.5×10^–13 kg m^–3 (≈ 2.7×10^14 particles (“hydrogen atoms”) per cubic meter). The blue line shows the impact of “inflation,” using Alan Guth’s suggested

What Was Our Universe Like Before the Big Bang?

A Hibernating Universe. Maybe before the Big Bang, the universe was a small, slowly evolving fixed space, as theorized by physicists like Kurt Hinterbichler, Austin Joyce and Justin Khoury and

The Big Bang: What Really Happened at Our Universe’s Birth?

Big Bang theory holds that our universe began 13.7 billion years ago, in a massive expansion that blew space up like a balloon. It doubled in size perhaps 100 times or more, all within the

Universe – Wikipedia

Comparison of the contents of the Universe today to 380,000 years after the Big Bang as measured with 5 year WMAP data (from 2008). (Due to rounding errors, the sum of these numbers is not 100%). This reflects the 2008 limits of WMAP’s ability to define dark matter and dark energy.

Diameter: Unknown. Diameter of the observable universe: 8.8×10²⁶ m (28.5 Gpc or 93 Gly)

The Temperature of the Universe During the Big Bang

The big bang theory of the origin of the universe is a logical result of the discovery by astronomer Edwin Hubble that the universe is expanding. If the expansion could be reversed, the entire universe would, at some point in time, contract into a single point in space.

Big Bang – Wikipedia

The Big Bang was “small”: It is misleading to visualize the Big Bang by comparing its size to everyday objects. When the size of the universe at Big Bang is described, it refers to the size of the observable universe, and not the entire universe.

What was the size of the universe 380,000 years after the

What was the size of the universe one second after the Big Bang? Was our universe still a black hole 380,000 years after the Big Bang? How big was the universe in the first few moments after the Big Bang?