How Large Is The Universe Youtube – All matter and energy in our universe appears to be governed by the fundamental laws of physics. These laws apply from the smallest subatomic scale to the vast expanses of space. But this was not always true. The early epochs of cosmic history were fleetingly short and surprisingly chaotic.
Second, after the Big Bang, gravity appeared as a separate force. A moment later, a mighty force came into its own. (This force will someday hold together particles such as protons and neutrons.)
How Large Is The Universe Youtube
At this point, the universe would still be unrecognizable to us. There was no light yet. Even this did not make any difference. There were no building blocks needed to make atoms and molecules. They will come later. But this period was active. In a tiny fraction of that first second, the universe will expand about 100 million billion billion times. wow you!
Just How Incomprehensibly Massive Is The Universe?
Soon the weak nuclear force took over, controlling the complex modes of interaction between matter and energy. Eventually, the electromagnetic force appeared. This laid the final foundation for charged particles and magnetism. Particles called bosons “carry” these forces. At last, this first, amazingly active moment in cosmic history is over.
Over the next few seconds, subatomic particles began to form. Then matter and energy separated. Their interactions were governed by these four new forces of physics.
The four forces that govern the entire universe may sound simple. But scientists still don’t know much about the nature of our universe. For example, how the forces controlled the early universe. Or what will be the ultimate fate of the universe? Even though our universe is one. But cosmologists are coming up with creative answers.
Quantum mechanics is the laws of physics that basically describe how things work at the subatomic level – that is, when it comes to things smaller than atoms. General relativity explains how gravity controls the interactions between large structures in the universe. Such “large” structures range from black holes and galaxies to people and grains of sand.
What Is The Hubble Constant?
Both quantum mechanics and general relativity work very well on their own scales. But sometimes scientists want to combine the two. For example, when it comes to packing a huge amount of mass and energy into a very small space. It can arise when scientists attempt to describe how the universe evolved in the first few moments after the Big Bang, when everything began to come into being. Indeed, strange things happen when researchers try to reconcile quantum mechanics and the laws of relativity.
That’s the problem. Quantum mechanics states that subatomic particles sometimes behave like waves and sometimes like particles. There is probability in the way they interact – randomness.
However, the laws describing large-scale matter, such as relativity, reject this notion of probability. In this area of physics, you can accurately predict how matter will behave based on physical laws. These predictions are reliable and repeatable. They leave no stone unturned.
So when physicists have to find a way to combine the randomness of quantum mechanics with the certainty of relativity, the mathematics of explaining what’s going on starts to break down. The answers to this math become nonsense.
Mysteries About The Universe Abound, From Its Beginning To Its End
It is possible to distinguish which set of rules apply where – larger objects governed by relativity and smaller objects by quantum mechanics – a tiny fraction of a second after the Big Bang. Before that a new theory would be needed to describe matter. This new theory, known as quantum gravity, is expected to unify quantum mechanics and general relativity.
“There are very, very, very, very few scenarios where you would need quantum gravity,” says Adrian Ericzek. “It’s good because we have nothing!” Erikachek is an astrophysicist at the University of North Carolina at Chapel Hill.
“There are very few scenarios where you have enough mass for gravity in a small enough space to be significant for quantum mechanics,” Erikk explains. “But the Big Bang is where we need it!”
This video describes the search for signs of quantum gravity and why it is so, very, very difficult. But if you want to understand why this is important, skip ahead to the 9:15 minute mark. And note in the YouTube comments that one viewer found a large number of errors (for which the video creator apologizes).
How Can We Comprehend The Size Of The Universe?
The lack of a theory explaining quantum gravity hasn’t stopped scientists from imagining how things might have evolved shortly after the Big Bang. Here are some possibilities.
Bubble Universe: Inflation is the name given to when the universe expanded explosively in the first seconds after the Big Bang. One idea for why this happened is that our universe is an inflated bubble in the foam of the expanding bubble of the universe.
If the universe is just one bubble among many, it could help solve another cosmic mystery: Why are the laws of physics the way they are? Why are fundamental forces like gravity so strong? Why do different particles like protons have the same mass as their own?
If our universe is just a bubble, and there are more bubbles beyond us, then each bubble may have its own laws of physics. The physics of our universe can be as it is only because of how our bubble was formed in the beginning. It could have easily evolved like other bubbles with completely different physics.
It All Started With The Big Bang — And Then What Happened?
This artist’s concept shows how scientists imagine the bubble universe. A series of them might look like this, some of which have partial walls or borders. Mark Garlick/Science Photo Library/Getty Images Plus
A universe of stars: Inside any piece of matter there are a large number of atoms. Inside each atom there is a set of subatomic particles. These include protons and neutrons. These particles are made of quarks.
String theory states that tiny one-dimensional “strings” exist inside quarks. These strings can vibrate at different frequencies. This is similar to how a plucked guitar string can produce different tones.
Eva Silverstein is a physicist at the Stanford Institute for Theoretical Physics in California. The interesting thing about string theory, she says, is that it can unify matter and energy on both the smallest (quantum) and largest (general relativity) scales. String theory may one day explain how the Big Bang gave rise to many of the fundamental laws of physics.
How Big Is The Universe? Is It Is Expanding And How Do We Know?
The Big Bang describes what probably happened in the early history of our universe. Even today the universe is expanding. But how might its rate of expansion be different in the distant future?
For some time scientists believed that the expansion of the universe may have stopped. He thought that the gravitational pull of all the mass in space could cause the universe to collapse. (It would be like a baseball being tossed into the air and falling rapidly.) Such a massive crunch could also release enough energy to trigger another Big Bang. This theory is sometimes referred to as the “oscillating universe”.
But the latest evidence shows that this is not the fate of our universe. The observations started tipping the scales towards the continued acceleration of the universe. In this case, it seems that the ball you throw in the air not only goes up, but continues to rise.
This seems to settle the question of whether the cosmic expansion will end. At the same time, even scientists cannot tell clearly
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For now, scientists are trying to explain what they’re seeing with an idea called dark energy. It is believed to make up about seven-tenths of the universe.
It happens. Telescope observations show that galaxies are flying away from each other at increasing speeds as they move away. but what kind of dark energy
One thing is clear about dark energy. Its existence makes an oscillating universe impossible. But almost everything else about this mysterious phenomenon is unknown.
The universe is about 14 billion years old. For the last 400 years, mankind has been observing it only through telescopes. We have a long way to go if we try to explain how the universe works. But like the incredible growth of the universe itself, man has come a long way in a very short time. An artist’s concept of the logarithmic scale of the observable universe. The Solar System gives way to the Milky Way, which gives way to nearby galaxies, which then give way to massive structure on the outskirts and the hot, dense plasma of the Big Bang. Every line of sight we can see includes all these epochs, but the search for the most distant observable won’t be complete until we’ve mapped the entire universe.
How Many Galaxies Are In The Universe?
When you look up at the night sky through the curtain of stars and the flatness of a nearby galaxy, you can’t help but feel small in front of the vast abyss of the universe that lies beyond. Although almost all of them are invisible to our eyes, our observable universe, which extends for tens of billions of light years in all directions, contains a fantastically large number of galaxies.
Exact number of galaxies remains a mystery as estimates rise
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