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Regardless of whether or not you are interested in space, everyone must have wondered, ‘Are there aliens?’ This is a concern of scientists and one of the great concerns of mankind.
Astronomers refer to aliens as ‘extraterrestrials’. If life exists on planets or satellites other than Earth, it is impossible to know whether it will be humans like humans, microorganisms like bacteria, or beasts like dogs and cats. .
In relation to extraterrestrial life, it is often asked, ‘Do you believe in aliens?’, but alien life is not an object of faith like faith. This is an area that requires a scientific approach.
Then, what do space scientists who study the universe think about extraterrestrial life? First of all, to talk about the conclusion, scientists believe that alien life exists and are looking for them.
For a long time, even among scientists, opinions on whether or not extraterrestrial life exists have been divided. Then, it was not so long ago, in the 1900s, that scientists concluded that there was extraterrestrial life. They came to a late conclusion about the existence of extraterrestrial life because they needed a scientific basis.
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Even if you haven’t met extraterrestrial life in person, the data that there is a possibility is important in the scientific community. The reason why scientists believe that extraterrestrial life exists is from knowing the size of the universe.
There are 200 to 400 billion stellar systems (solar systems) like our solar system in the Milky Way, to which the Earth belongs, and these galaxies amount to hundreds of billions in the currently observable universe. In addition, planets such as Earth and Mars, and satellites such as the moon have a ‘year’ unit or more beyond the ‘longitude’ unit in the universe.
Even mathematical calculations alone, it makes no sense that there is life only on Earth. Carl Sagan, one of the greatest astronomers of our time, was so convinced of the existence of extraterrestrial life that he said, “It is a huge waste of space that only Earth has life in the universe.”
In this way, experts who study the universe no longer doubt the existence of extraterrestrial life. The question is whether we can directly confirm the existence of extraterrestrial life and interact with them. In response, scientists are putting a lot of effort into finding extraterrestrial life, and we will find out in the next article what kind of efforts our humanity is making to encounter aliens.
