Wednesday, February 8, 2023

The Fermi Paradox Are we really alone in the universe or are we being watched?

Since the development of space science, it is common to wonder whether there is life on other planets or whether we are really alone in the universe. At the moment, and after centuries of history, no one has been able to answer that unknown, which turns into an interesting paradox: fermi paradox,

Scientists rely on logic and facts. The latter, for example, accounts for the countless number of stars in the universe, as well as galaxies and planets. They also confirm that NASA Has discovered more than 5,000 planets since its inception, but it is not yet known whether any of them have life., Disappointing and heartbreaking.

Logic also says that given the distances in light years that separate us from other galaxies, we may never encounter an extraterrestrial civilization. really, The nearest galaxy to our solar system is 28,000 light years away and only one light year is equal to 9 trillion kilometers,

Parallel to this problem, there is also the remnants of the Solar System Earth Will Be Swallowed in About 5 Billion Years, When the Sun Becomes a “Red Giant” And absorbs the planets around it. It would be long before aliens from the nearest galaxy would be able to visit Earth.

Add to this the fact that climate change and exploitation are depleting the resources on which humanity depends, such as water, food and clean air, so it could become extinct very quickly.

All of the above creates a mystery full of contradictions, and thus it unfolds Fermi Paradox, introduced by scientist Enrico Fermi in 1950,

What is the Fermi Paradox?

physicist proposed Hypotheses that confirm that there is a high probability of intelligent life in the observable universe are not matched by a lack of evidence. of these civilizations.

He was in his 50s exactly 72 years ago. As of 2022, scientists still have no evidence of life.Under the consolation that the 5,000 planets discovered by NASA is a minimal amount of the observable universe, without counting other space agencies around the world, is not exhaustive.

For perspective, the science so far is guesswork. There are about 100 billion galaxies in the universe, each of these galaxies contains about 100 billion stars. And for each star there are 1 to 9 planets.

Looking at these unfathomable numbers, It is possible that the Fermi Paradox may never be resolved As long as humanity lives on earth.

Just as it’s also possible that – if we’re lucky – NASA or some other space science organization has discovered a planet with the conditions to host life, without actually checking whether it exists and Without receiving communication with “them”, which is due to the distance separating us.

Some solutions to the Fermi paradox

From this point of view, there are many theories that experts have tried to explain the reasons for non-communication and/or recognition of extraterrestrial life. Some of the most famous hypotheses are quite logical and others are closer to fantasy.

In 1961, just 10 years after the Fermi Paradox, radio astronomer Frank Drake developed the so-called Drake equation, which attempts to estimate the number of civilizations that may have existed at that time and during subsequent peer-reviews. Gives great results.

However, even with positive results, some scientists who analyzed Drake determined that at the time he did not consider the fact that a civilization is born and dies. So there will be many forms of calculation.

Using the same equation in 2015, astronomers at the Space Telescope Science Institute proposed that Earth-like planets have yet to form in the universe. In this case, the conclusion would be that humans first existed on Earth and are still somewhat alone in the universe.

Other theories hold that the aliens are too far away to contact themEspecially considering that communication on Earth doesn’t even reach the diameter of the Milky Way, which is 150,000 light-years.

To amplify signals to those magnitudes, they would have to travel at the speed of light, something humanity has yet to figure out. Now, if the aliens did it first, the chances of getting hit by a signal in the near future are very slim.

Other ideas closer to fiction also suggest that, Other civilizations will be far more advanced and will be dedicated to watching us rather than communicatingConsidering us a wild region of the universe.

Similarly, there are other experts who, lacking solid evidence, rule out the possibility that there is life on other planets. However due to the vastness of the universe it is considered to be an extreme.

space race to find life

The vastness of the universe has not been a reason for humanity to give up on the search for life on other planets. beyond the study of the universe, Space agencies across the planet collaborate on the mission to search for extraterrestrial life with various programs,

Initial efforts for this include The Viking Project (1975)Which was the first American mission to successfully land a spacecraft on Mars with Viking 1 and then Viking 2.

These missions also allowed the first biological studies of the Red Planet and They were promoted by the famous scientist Carl SaganDocumentary series known for universeWhich marked a milestone in scientific dissemination.

On the other hand, and a little further, In 1989, NASA launched the Galileo mission.An orbiting probe that will be dedicated to observing Jupiter and its moons, to study the biology, structure and history of the gas giant.

There the first signs of the possibility of life began to emerge on one of the giant planet’s moons.Europe. To date, scientists have determined that there are chemical conditions for life to exist.

This time, They theorize that there is a vast amount of water beneath its frozen surface that could be an ocean with organisms living inside., Years later, in 2011, the Juno mission was launched to study the moons more closely.

With more detailed data, the Europa Clipper mission eventually began to develop, which would send a probe to explore Europa to collect more data about this hypothesis.

With fewer results, the Voyager probe also stands out, also promoted by Carl Sagan. These include 2 American space probes sent into outer space to find life.

Released in 1977, they hold a gold record with data about humanity, such as music, appearance of man, some history and greetings. This is so that, in the event of detection by other civilizations, they would know who we are and where we are located in the universe.

even in this difficult task The Kepler space telescope is relevant, specially designed for the identification and classification of exoplanets With its high-grade infrared light and launched into space in 2009.

Finally in 2021, James Webb Space Telescope (JWST) launched, as a follow-up to Hubble, launched in 1990 and is soon to go out. The James Webb reaches very high power and is currently dedicated to deep space observations and the search for planets with life.

After only 4 months of settling into orbit, it is already delighting with incredible views of deep space and thanks to it, astronomers managed to identify the chemical composition of an exoplanet’s atmosphere for the first time.

The latter will be a key point in continuing to look for life, as it will make it easier to determine which planetary possibilities to pursue, as well as other answers in the universe that are unknown to date.

Nation World News Desk
Nation World News Desk
Nation World News is the fastest emerging news website covering all the latest news, world’s top stories, science news entertainment sports cricket’s latest discoveries, new technology gadgets, politics news, and more.
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