What you need to know about the search for extraterrestrial life

Humanity has been asking for centuries, “Is there someone out there, somewhere?” seek the answer to the question. As scientists struggled to answer this question, many astronomical discoveries were made. In this process some crazy theories have been put forward, even some theories about the planets have been proven. But even after thousands of searches, no traces of extraterrestrial life have been found. So how did this quest begin? Here’s what you need to know about the search for extraterrestrial life…

1. Galilee Galilee

Humanity’s search for life in space began in the 17th century. Galileo’s telescope, built at the beginning of the 17th century, made it possible to study the confines of the sky. At that time, the dark spots observed on the moon were considered to be very large oceans. So much so that these points have received the name “maria”, which means “sea” in Latin. Today we know that these dark spots are plains of dark basalt.

2. What did the Martians look like?

extraterrestrial life

Astronomer William Herschel thought the Martians living on the Red Planet in the 19th century were taller than the average human. With a telescope more powerful than that of Galileo, Herschel calculates the size of the red planet, its seasons and the length of the days. According to him, Mars was much smaller than Earth. Therefore, the gravity should have been less. This meant that people living on Mars would be taller.

3. Were our Saturnian cousins ​​smarter?

The search for extraterrestrial life has sometimes given rise to some very wild theories. The famous philosopher Immanuel Kant made an interesting observation about the intelligence of extraterrestrial creatures. According to him, the intelligence of these creatures was directly proportional to the distance between the planet on which they lived and the sun. In this sense, given the space explorations at that time, the Saturnians would have been the most intelligent creatures in the universe.

4. Foreigners are included in the census

extraterrestrial life

Science teacher and pastor Thomas Dick tried to calculate the number of extraterrestrials in 1848. At that time, 280 people per mile lived in England. Dick thought the population density in space might also be similar to that of Britain. Thus, he estimated that there could be 22 trillion people living in the solar system.

5. Is there life on satellites?

In the past, nearby planets were considered the best places to search for extraterrestrial life. Later, however, Europa, orbiting Jupiter, and Enceladus, Saturn’s moon, began to be studied. Both moons have water under a thick layer of ice. It is believed to be a heat source that prevents water from freezing under the ice. According to the scientists, this heat source could be produced in the heart of the satellites and released to the surface from hydrothermal vents.

6. If there is life on satellites, what do living things look like?

Scientists highlight simple physical knowledge about the appearance of life on satellites with water. If creatures live in these waters, they must move quickly to catch or escape prey. For this reason, creatures living in the waters of satellites can have an aerodynamic shape like sharks, dolphins and squids.

7. Distant Worlds

Scientists believe there could be forty billion Earth-like planets in the Milky Way galaxy alone. In making this prediction, astronomers studied 3800 planets outside the solar system. When the calculation is applied to all the galaxies, it turns out that there are billions of planets. It is believed that there may be life on any of these planets. For this reason, new technologies are produced to reach the deepest points of space.

8. How do I look for vital signs?

extraterrestrial life

When astronomers search for planets outside the solar system, they study gases called biosignatures. These gases are considered signs of life. From termites to cows, many creatures around the world emit methane. However, volcanoes can also produce methane. Therefore, along with methane, other gases such as oxygen and ozone, which are formed naturally by the sun’s rays, are also sought after in distant regions of space.

9. Are there living areas?

extraterrestrial life

When describing the size of the universe, the Earth is said to remain at a smaller size than the peak. So where should we look if we want to find extraterrestrial life? Scientists believe that the focus should be on regions outside the solar system. It is stated that this planet should not be too far or too close to its own sun. In other words, it is claimed that the conditions for life will not occur on a planet that is neither too cold nor too hot. The closest planet discovered outside the solar system is Proxima Centauri b. Let me also point out.

10. Navigate Space

extraterrestrial life

A privately funded project called Breaktrough Starshot has been launched in recent years. With this project, the Russian investor and physicist Yuri Milner tries to create a concept of a spacecraft capable of traveling between star systems. The spacecraft should travel at one-fifth the speed of solar wind and light. If the project is successful, it may take the spacecraft twenty years to reach Proxima Centauri b. and four years to send data back to Earth.

11. Are aliens smarter than humans?

extraterrestrial life

Scientists believe that some extraterrestrials could live in black holes, very massive stars and even the huge black hole at the very center of the Milky Way. If these extraterrestrials are a civilization thousands or millions of years older than us, they may have evolved artificial intelligence. Some astronomers believe that artificially intelligent civilizations may prefer to live in high-energy regions such as massive stars and black holes.

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