Do you have a life there? The existence of other technical types is very possible

We live in the golden age for space exploration. Scientists collect a lot of new information and scientific evidence at a record pace. However, old questions remain unprecedented. Are we alone?

New telescope technology, including space -based tools such as James Webb Telescope, has discovered thousands of residents that can support the same life as the earth.

The gravity wave detector has opened a new means of space exploration by detecting space -time distortions caused by black holes and hundreds of light -year -old supernova.

The Commercial Space Venture accelerates these progress, leads to more sophisticated spaceships and reusable rockets, meaning a new era of space exploration.

NASA’s OSIRIS-REX MISSION landed on the asteroid Bennu, 27 million miles away from the earth, and brought back rock and dust samples.

In the future, in the future, we have developed the ability to develop robots on the moon and Mars, along with the plan to send humans to these celestial bodies.

The central propulsion of all of these ambitious efforts is the basic problem of whether there is life everywhere in the universe or whether it has existed.

Define life

Defining life is surprisingly challenging. We intuitively recognize that living creatures have life, but the exact definition remains unbearable. The dictionary provides a variety of explanations, such as the ability to grow, reproduce, and respond.

However, even these definitions can be ambiguous.

More comprehensive definitions are regarded as an independent chemical system that can handle information and maintain a low -entropy condition with little disability or randomness.

Biology always requires energy to maintain molecular tissue and maintain highly organized structures and functions. Without this energy, life will quickly become confused and devastated. This definition contains the dynamic and complex properties of life, emphasizing the adaptation and evolution ability.

Life on the earth is based on the interaction of DNA, RNA, and protein, as we currently understand. The DNA functions as a blueprint of life, including the genetic instructions necessary for the development, survival, and breeding of living things. These instructions are converted into messages that lead to protein production, which is a work hole of cells that cause vast functions.

This complex system of DNA duplication, protein synthesis, and cell processes is based on the long -strings of molecules associated with carbon atoms, but are based on life on the earth. However, the universe may have a life form based on completely different principles and biochemicals.

Something other than carbon

Life elsewhere can use different elements as building blocks. Silicon, which has a chemical similarity with carbon, is proposed as a potential alternative.

If they exist, silicon -based creatures may show unique characteristics and adaptations. For example, a silicon -based structure may be used for support, similar to carbon -based organism bones and shells.

Silicon -based creatures have not yet been found on earth, but silicon plays an important role in many existing creatures. This is an important secondary component for many plants and animals, and plays a structural and functional role. For example, diatoms, a kind of algae found in the ocean, feature a cell wall like glass made of transparent silicon dioxide.

As a result, diatom is not a silicon -based life form, but it has been proven that silicon actually functions as a components of organisms. However, it is not yet known whether there is a silicon -based creature at all or what it looks like.

Origin of life on the earth

There is a hypothesis on how the life has occurred on the earth. One is that the living building block of life was delivered by MET or MET stone. The other is that these building blocks have spontaneously gathered through globe chemistry in the early environment of our planet.

MET stones have been shown to carry organic molecules that actually contain amino acids essential for life. It is formed in the deep sea, and then organic molecules brought to the earth by MET stones and asteroids.

On the other hand, early Earth Chemical Process on Earth, such as warm small ponds and those generated deep in the sea, may have provided necessary conditions and ingredients to appear in life.

However, it was not possible to present a comprehensive route to the formation of the first cell life on the RNA, DNA, and the first cell life on the earth.

Many biological molecules are chiral. In other words, it exists in two forms that are mirror images of each other like the left and right hand. Both left and right and right -handed molecules are usually generated naturally in equal amounts, but recent analysis of MET stones has revealed a slight asymmetry, and the left -handed form is up to 60 %.

This asymmetry in the organic molecules derived from the space suggests that it can be observed in all biological molecules (proteins, sugar, amino acids, RNA, DNA) on the earth, which can be caused by a slight imbalance from the universe. It suggests that the life on the earth may have occurred from the one supplied from space. Origin outside the earth.

Possibility of life

The slight imbalance of the chirity observed in many organic molecules can indicate that life on the earth is due to the delivery of organic molecules by extraterrestrial biology. We may be a descendant of life born elsewhere.

The drake equation developed by astronomers Frank Drake in 1961 provides a framework to estimate the number of civilizations in the galaxy.

This equation calculates the ratio of planets that incorporate factors such as the speed of the star formation and the ratio of stars with a planet to create intellectual life. Optimistic estimates using this formula suggest that 12,500 intelligent alien civilizations could exist only in the Milky Way.

The main discussions of life outside the earth remain stochastic. Considering the huge number of stars and planets, it seems unlikely that life was not born elsewhere.

It is thought that less than one in 10 billion people may be the only technical civilization of the universe that human beings can be observed. Furthermore, the possibility that civilization will develop on a single -living planet is better than one in 60 billion.

Observable universe has an estimated 2,000 trillion trillion star, so the existence of other technical species is potentially possible even in the Galaxy in our Milky Way.

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