Table of Contents
What temperature was the universe 300000 years after the Big Bang?
The temperature of the universe was around 10^32 Kelvin. 3 minutes after the Big Bang – Protons and neutrons began to come together to form the nuclei of simple elements. The temperature of the universe was still incredibly high at about 10^9 Kelvin.
How big was the universe right after the Big Bang?
46.1 billion light-years
Today, 13.8 billion years after the Big Bang, the Universe is 46.1 billion light-years in radius — in all directions — from our vantage point.
How big was the universe 400000 years after the Big Bang?
Eventually, the universe cooled sufficiently that protons and electrons could combine to form neutral hydrogen. This occured roughly 400,000 years after the Big Bang when the universe was about one eleven hundredth its present size.
What happened to the universe 380 000 years after the Big Bang?
One second after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos. Roughly 380,000 years after the Big Bang, matter cooled enough for atoms to form during the era of recombination, resulting in a transparent, electrically neutral gas, according to NASA.
How hot was the universe 10 billion years ago?
The study probed the thermal history of the universe over the last 10 billion years. It found that the mean temperature of gas across the universe has increased more than 10 times over that time period and reached about 2 million degrees Kelvin today — approximately 4 million degrees Fahrenheit.
What was the universe like 5 billion years ago?
When the universe was half its present size, nuclear reactions in stars had produced most of the heavy elements from which terrestrial planets were made. Our solar system is relatively young: it formed five billion years ago, when the universe was two thirds its present size.
What was the universe like 100 million years ago?
The Era of Recombination 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).
How many years does the earth have left?
By that point, all life on Earth will be extinct. The most probable fate of the planet is absorption by the Sun in about 7.5 billion years, after the star has entered the red giant phase and expanded beyond the planet’s current orbit.
What happened to the universe after the Big Bang?
About 380,000 years after the Big Bang, the universe was cool enough that hydrogen could form. Because the CMB photons are barely affected by hitting hydrogen, the photons travel in straight lines. Cosmologists refer to a “surface of last scattering” when the CMB photons last hit matter; after that, the universe was too big.
How old is the universe?
In addition, the new portrait precisely pegs the age of the Universe at 13.7 billion years old, with a remarkably small one percent margin of error. The WMAP team found that the Big Bang and Inflation theories continue to ring true.
What is the oldest observation we currently have of the universe?
This is the oldest observation we currently have of the universe. From 370,000 years until about 1 billion years. After recombination and decoupling, the universe was transparent but the clouds of hydrogen only collapsed very slowly to form stars and galaxies, so there were no new sources of light.
What is the size of the universe in light years?
Size and regions. The proper distance —the distance as would be measured at a specific time, including the present—between Earth and the edge of the observable universe is 46 billion light-years (14 billion parsecs), making the diameter of the observable universe about 93 billion light-years (28 billion parsecs).