The universe is full of mysteries and unexplained phenomena.
Its huge size in itself is a mystery. And, in the end, what the universe is — no one knows. In this review we gathered the most incredible mysteries that continue to haunt scientists.
1. How old is the Universe
At the dawn of the XXI century, despite all the inventions and technological progress, the age of the Universe remains a mystery. According to recent estimates of experts, the age of the Universe is 13.8 billion years.
2. How galaxies form
There are a lot of discussions about how galaxies formed, but actually nobody knows for sure. Scientists do not know what happened after the Big Bang, small particles began to slowly and gradually unite to form stars, star clusters and galaxies or the universe was originally a structure in the form of clumps of matter that later became divided into galaxies.
3. Rectangular galaxy
It’s called “galaxy in the form of emerald” and she was recently discovered by an international team of astronomers Swinarski University of technology in Australia. Galaxy in the shape of a precious stone was discovered using the Subaru telescope of the Japanese astrophysicist Lee Spillerom. It is believed that the unusual shape is the result of two galaxies colliding.
4. The universe before the Big Bang
Was there anything before the Big Bang. This, probably, people will never know.
5. How life first appeared on Earth
Scientists know that the Earth was devoid of life when our Solar system was formed. However, whether the first forms of life on Earth or elsewhere – is a huge mystery, which is subject to serious scientific debate. Previously, scientists believed that all life could arise spontaneously, but some scientists believe that complex organic molecules could arise in space and was brought to Earth by comets or meteorites.
6. Dark matter
No one knows exactly what dark matter, which supposedly 22% of the Universe. Since (presumably) it emits no electromagnetic radiation and does not interact with him, direct observation of dark matter is impossible. The conclusion about its existence was made on the basis of the behavior of astronomical objects and the gravitational effects.
7. How big the universe is
Everyone knows that the universe is huge. Although the size of the observable Universe is about 13.8 billion years, the distance to the edge of the observable Universe is about 46 billion light years. This is because the universe is constantly expanding and constantly becoming more all the time until the light went to the Ground.
8. Black holes
The concept of black holes back to 1780, when John Michell and Laplace predicted the existence of “dark stars” whose gravity was so strong that it attracted even light emission. However, people still do not know much about black holes. For example, in 2014, scientists discovered a galaxy with three supermassive black holes in the center (and previously it was assumed that in the center of the galaxy can only be 1 black hole).
9. Gamma-ray bursts
One of the greatest mysteries in astronomy in the last three decades is the nature of gamma-ray bursts (the most powerful game in the Universe of energy). Scientists can record them and watch them, but they still don’t have a clue why they randomly appear and why they occur.
10. Dark energy
According to the most generally accepted theory, dark energy must act in opposition to gravity. It is approximately 68% of the Universe and causes its expansion. In all other respects, what it is is a complete mystery.
11. Was there a Big Bang
The age of our Universe, according to Einstein’s theory is approximately 13.8 billion years old and it was formed from an infinitely small point during the Big Bang. Although the majority of scholars today accept this model, the scientific community still can’t explain what happened in this little spot before the explosion and why it happened.
12. Whether people are alone in the Universe?
This is another great mystery, which many thinkers and scientists have tried to solve throughout the history of human civilization, but still not found an answer. Also, the question is whether people in General to realize a completely different life right now for people watching different type of life, and they don’t even realize it.
13. The origin of life
This is, without doubt, one of the oldest questions and the biggest mystery in the history of mankind. Although there are theories out there that try to explain complex chemical reactions, actually scientists don’t have a clear definitive explanation of life.
14. Is it all around
Since then, as people began to reason analytically, this question lurks somewhere in the subconscious. And it is this: whether what people see what it really is.
15. What gravity really is
Gravity played a big role in the creation of the universe in its present form. Due to gravity the pieces matter “stick together” in planets, moons and stars. Because of gravity, when a person drops something, it falls down, not up. But what is it really – is unknown. Although scientists can observe and understand how gravity “behaves” they have no idea why it exists. For example, if gravity is the force that causes all matter to be attracted to all others, why inside atoms are mostly empty space.
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