What is the origin of the universe? Are there aliens?

People who are outside the earth are called aliens.

First, the big ** theory.

The grand ** theory holds that the universe originated from a single dimensionless point, that is, a singularity that is scaleless in space and time but contains all the matter in the universe. At least 12,015 billion years ago, the universe and space itself were formed from this point**.

Second, the steady-state theory (has been denied, but if you want it, you can post it.) Homeostatic theory holds that the universe remains in the same state at all times, on average.

For centuries, many scientists believed that the universe was simple and basically unchanged except for a few subtle parts. The universe doesn't need to know the beginning or the end. Even after discovering that the universe was expanding, this idea was not abandoned.

This theory was put forward in the late 40's and believed that matter was being created at an appropriate rate just enough to maintain the density of matter in the universe. The universe remains the same at all times, on average. One of the advantages of homeostasis theory is its clarity.

It predicts with great certainty what the universe should look like. Because of this, it is easily challenged or refuted by observational facts. When cosmic background radiation was discovered, the theory of hitching was largely rejected.

Big**Big**: The prelude to the universe was unveiled About 15 billion years ago, an earth-shattering big ** occurred - the universe was born! At that time, the universe was a very dense fireball with a temperature of several trillion degrees.

There are many particles in the pulsating chain, which collide with each other. These particles are the basic units that make up all the elements in the universe.

After the big **, when the matter that makes up the galaxy in the universe appears large, the proton is already there, and less than a minute after the big **, the helium nucleon is produced. After about 100,000 years, the temperature of the universe gradually decreased, and the proton and helium nucleons combined with electrons to become hydrogen atoms and helium atoms, which are the main elements that make up galaxies.

Take our galaxy as an example, look at the formation of the universe scattered in the universe of matter is sparse and dense, the dense area of gravity is larger, will suck the nearby gas, more and more, become a large gas mass, and slowly shrink, this is the primordial galaxy cloud.

Our Milky Way is just one of them, the Milky Way in the Milky Way is densely distributed in the Milky Way, the dense areas will shrink and condense, and finally shine brightly, and the stars will be born, and the Sun is our Milky Way2'One of 00 billion stars.

Since the 17th century, the British scientist Isaac Newton discovered universal gravitational endurance, that is, all objects in the universe including stars, the sun, the moon, planets and other objects have mutual attraction, the greater the mass of the object, the greater the attraction, the distance between the objects increases, the gravitational attraction will weaken, all galaxies in the universe, the formation of planets, are controlled by gravitational force, interstellar matter gathers to form galaxies, planets.

Absolutely. There is life on Earth, why can't there be extraterrestrials!

And many scientists have also done experiments to try to kill bacteria on the earth, but they can't kill them completely. Without oxygen and water, some of the bacteria survived and began to mutate!

Yes, if you think about it, the earth is just a small grain of sand in the vast universe, and since there are earthlings, there will also be aliens. If you dare to be interested in UFO video clips, I will introduce you to **, which includes a lot of UFO videos from all over the world.

Although scientists believe that even if there are aliens, it is impossible to fly to Earth because of the huge distance between the planets, they do not deny the possibility of intelligent life in outer space.

Whether extraterrestrial beings exist.

UFOs exist in mysterious ways, and tens of millions of earthlings claim to have seen UFOs. Are these "witnesses" fantasists or **? Or is there something between a lie and a truth?

Is the answer on a planet in space, or is it from humanity's cult of mystery?

The first boom in UFO research in the world began with the most famous "Arnold event" in the history of UFO research. UFO is an English abbreviation that means "unidentified flying object", also known as "flying saucer" or "UFO", which refers to a moving flying object or astronomical spectacle that can be observed by the naked eye or radar, and which is currently unexplained by humans. People who are interested in UFOs not only speculate that this is from a civilization that is more advanced than the earth, but also explain this phenomenon with psychological inferences about the problems that modern people may face.

UFOs are described as: moving or circling rapidly; Silent, erratic, or unusually roaring when moving; Shapes such as saucers, cigars, sphericals, rings or ovals have been counted in more than 100 different forms.

Are there any aliens in the universe?

Are there any aliens in the universe? Star Awareness Project