Science
How the Big Bang Model Grew in the History of Physics
It seems amazing that using data from observations of the present, we can come to a conclusion of how the universe’s state was in the past, about 14 billion years ago. […]
Professor Gary Felder
Astronomy
What Happened as the Universe’s Temperature Cooled Down after the Big Bang?
After the big bang, when the universe had reached a temperature of about 10 billion degrees which was 100 times cooler than when the first quarks combined, interesting things began to happen. […]
Astronomy
The Big Bang Model: The Early Stages of Our Universe
After the big bang, our universe was very different from what it is now, but it started changing rapidly. For example, many types of particles existed then that don’t exist now. […]
Astronomy
Planck Density: Why We Can’t Know Everything about the Universe
We almost know everything about what happened after the big bang, but we can’t study what happened before the event because our laws of physics don’t work at the densities matter had at the time. […]
Astronomy
After the Big Bang: The Consequences of the Universe’s Inflation
The inflation of the universe after the big bang was so rapid that in a fraction of a second, particles that were an atom’s width apart from each other were suddenly thousands of light-years away from each other. […]
Quizzes
Quiz: How Much Do You Know about the Big Bang?
Contrary to popular belief, the Big Bang model does not describe how the universe came to be. Test your knowledge in our fun quiz. […]
Astronomy
The Big Bang Nucleosynthesis
About a minute after the big bang, protons and neutrons began combining into light nuclei. The temperature had dropped below about a billion degrees, and it was the perfect time for nuclear fusion to begin. […]
Astronomy
Annihilation and Creation: The Story of Matter and Antimatter
Matter and antimatter collided and annihilated each other a hundred thousandth of a second after the big bang. By one second, however, annihilation had begun to overtake creation. […]
Astronomy
After the Big Bang: Formation of Stable Particles
A hundred thousandth of a second after the big bang, the universe consisted of particles that were all flying about freely. However, today, all of the quarks are bound up in protons and neutrons. […]
Astronomy
The Big Bang Model: Evolution of Our Universe
The theory of relativity said that a static universe was impossible. Later, Lemaître described what an expanding universe would look like, based on general relativity, and this was later substantiated by Edwin Hubble. […]