3 Reasons Preventing Aliens from Visiting Earth

SadaNews - The recent release by the U.S. government of hundreds of previously classified cases of Unidentified Aerial Phenomena (UAPs) has revived the idea of aliens visiting Earth.

Polls in the United States, Australia, and several other countries indicate that about a third of the public believes in the existence of aliens, according to a report by (the conversation).

Despite several indications suggesting the possibility of extraterrestrial life, there are three valid reasons that make their visit to Earth "unlikely," according to a study published by (Sciencealert).

The Vastness of Space

Space is incredibly vast beyond our imagination, with the closest star to our sun, "Proxima Centauri," located about 40 trillion kilometers away, equivalent to 268,000 times the distance between the sun and Earth.

This equals 4.3 light-years according to measurements by astronomers.

A light-year is the distance light travels in one year at a speed of 300,000 kilometers per second.

Humans can only travel through space at a minuscule speed compared to the speed of light using current technologies.

Even the fastest spacecraft humans have, the "Parker Solar Probe," has a maximum speed of just about 191 kilometers per second, which is equivalent to 0.064% of the speed of light.

At this speed, it would take about 6,650 years to reach "Proxima Centauri."

Nobel Prize-winning physicist Albert Einstein previously demonstrated that "time is relative"; time flows differently throughout the universe.

The faster a spacecraft moves away from Earth, the slower time passes for its passengers, a phenomenon known as "time dilation."

For instance, when NASA astronaut Scott Kelly returned to Earth after a year on the International Space Station, he was younger than his identical twin by mere fractions of a second.

For any aliens, the difference would be greatly magnified due to the necessarily "higher speed" required for a round trip from a distant star system.

Thus, aliens would return to their home planet potentially 100 years or more older than when they left.

Massive Energy Requirements

Interstellar travel necessitates "huge energy requirements," as the mass of a spacecraft increases with speed, requiring an ever-increasing amount of energy to accelerate it.

At the speed of light, the spacecraft's mass becomes immense, necessitating a tremendous amount of energy, which is theoretically impossible to provide.

According to Mexican physicist Miguel Alcubierre, it is possible to "travel faster than light, but it comes with huge challenges and tremendous energy demand that are not currently feasible."

Unique Biosphere

The "biosphere" is the area where living organisms can survive on Earth, described by scientists as "unique."

Oxygen is not toxic to humans, but it is highly reactive and could be harmful to aliens, necessitating protective suits similar to those worn by humans when visiting harsh or toxic environments.

Do Aliens Really Exist?

Scientists currently lack sufficient information about the existence of extraterrestrial life in the vast universe. So far, about 6,200 exoplanets have been discovered in more than 4,700 solar systems, but none resemble Earth or our solar system.

Most stars are likely to have at least one planet, and there are more than 100 billion stars in our galaxy alone. With this enormous number of planets, some may be habitable.