Dozens of spacecraft and hundreds of probes takeoff from Earth and head for our planets twin sister Venus, it’s about the same size as the earth, it has around 80% of our planet’s mass. The temperatures here are too high for humans. And it doesn’t have the air we’re used to breathing. But we went there because scientists recently found traces of phosphine gas, which suggests that life might be there. phosphine comes from various microbes and bacteria. So humanity goes on this journey to discover this life. With our technology. A flight to Venus would take three and a half to six and a half months, but we finally made it.
Spaceships are landing on the planet. When the first humans come to the surface. They see heat scorch deserts, lava lakes, and geysers of poisonous acid. And that’s it, scientists miscalculated the radio telescope data phosphine never existed on Venus. So we’re going back to the rockets and we’re getting ready for a longer trip across our galaxy. The scientists believe that there’s at least 36 civilizations in the Milky Way that are similar to ours, they could be living organisms completely different from us, they may have different bodies, different eyes, they may walk and talk in a very different way than we do.
But an advanced civilization has several criteria, technological progress in the use of developed communication between individuals. So these civilizations must explore space build cities, in be able to communicate with each other as independent species. Let’s look at our galaxy and find these civilized worlds.
So the Milky Way is a spiral of 100,000 light years from side to side. If a star is born at one end of it in a super powerful blast, the light from that event won’t even reach the other end until 100,000 years later, there’s about 100 billion stars and near each of them, there may be worlds similar to our solar systems, let’s try to find these habitable worlds using giant seas. First, we look for stars that have a lot of iron, such stars burn at the perfect temperature for the development of life. In the iron in the star system will help form the cores of planets that will be home to another civilization, we sift the Milky Way through our sea, we see that there are too many stars that fit the description, so we need another filter.
Now let’s find stars that look like the sun in this pile, the star must be about 100 times larger than the Earth, and 333,000 times heavier. An important criterion is the age of the star. When a star gets old, it begins to expand and turns into a red giant. At this time, it can absorb the planets around it, the life of such a star can end with a huge blast that destroys everything around it. So the star we’re looking for must be relatively young. Let’s use our save again. there’s fewer stars, but still, that’s a lot. Now let’s focus on the planets, they should be in the habitable zone of the star not too close to a star because then the temperature would be too high for life to be born and not too far away, then the planet would just be an ice block with nothing living on it, the temperature of the planet must allow the water to remain liquid.
Another filter is the age of the candidate planet, it takes time for an advanced civilization to develop. based on the experience of Earth, scientists believe that it takes at least 4.5 billion years for any life form to evolve to the human level. So we’re looking for planets similar to Earth or older.
We use our seed one last time, and voila, we have 36 worlds where an advanced civilization is possible. Scientists conducted this study and published it in April 2020. Based on these very criteria, all that’s left is to discover these civilizations and make the first contact, we can detect such a civilization by using radio waves that come from it. Suppose there’s a planet with primitive living organisms on it, millions of years of evolution, and they’ll become a civilization with advanced technology.
Radio waves will be the way they communicate, then the whole planet will emit radio waves like a star emits light, and here on earth will be able to pick up this signal with antennas pointed into space. But there’s a problem with the distance between the planets. For example, planet a is 1000 light years away from the earth. When planet a starts emitting radio waves.
These signals won’t reach us until 10 centuries later, we learned to emit and receive radio waves in 1895. And if the civilization on planet a emitted a radio signal at the same time, we won’t be able to pick up that signal until 2895. It’ll be the same on planet a, we sent a message in the form of a radio signal into space in 1974. In the signal, we encoded our number system, human DNA and information about our solar system. If there’s an advanced civilization on planet a, they’ll be able to receive this signal only in 2974. And we’d have to wait another Millennium to get a response from them. Another problem with radio waves is that they don’t look like a constant glow on the
planet but like a flare, radio waves are only used at a certain stage of civilization. At first, it’s the primary method of communication. But then we begin to use cell phones, cable TV and fiber optics. And as technology advances further, our radio wave light begins to fade out. So we only have about 100 years of active radio used by civilization to find.
One day we caught a strange radio signal of an unknown origin, its characteristics suggested that the signal was created artificially, perhaps by an outer space civilization or a passing starship. Further searches for this signal given no results in this gave rise to many theories and arguments as to what it really was, it could have been a signal from Earth that reflected off a satellite flying through the sky, or it could have been the traces of a comet a few light years away. But let’s assume it was a civilization from outer space, one of those 36 that probably exist, now we need to make contact with them. So we throw our luggage into a rocket and head out in the direction of our suspected planet.
Our rockets can fly at 17,600 miles per hour. That means a rocket could cross the entire United States in just eight minutes. But even if an advanced civilization lived near our closest star, Proxima Centauri, it would take us about 73,000 years to get there. Even at the speed of light, it would take 4.2 years, so we need to solve the problem of space travel, our scientists plan to reach about a quarter of the speed of light with a laser, a powerful laser beam from Earth will push a microscopic probe in the right direction, this probe could reach our destination in about 17 years. And in another four years, when the signal from it reaches Earth, we will know if there’s an advanced civilization.
Another possibility for faster than light travel is the warp bubble spacecraft, the spacecraft would have to compress space in front of it and stretch it behind its tail, then we’ll be able to reach any point in the universe in literally a few seconds. But such travel remains a fantasy for us. Perhaps we can get to different corners of the universe through wormholes, they’re shortcuts similar to tunnels, but there’s one problem. These wormholes might be inside black holes to the most mysterious objects in the universe. They’re so heavy that even light can escape their trap. Our spaceships wouldn’t stand the tension either.
There’s also a theory that Earth is unique because it was born under completely accidental circumstances. Four and a half billion years ago, our planet was a block of lava that began to cool and solidify, but its tranquility was broken by an asteroid the size of an entire planet flying by the collision occurred at such an angle that the Earth was not completely destroyed, but part of the asteroid remained in our orbit.
A heavy rock near our planets stabilized Earth’s rotation in the gravitational interaction with a giant debris caused our core to heat up. In addition, the asteroid brought a lot of water to Earth. Such a collision is extremely unlikely. It’s like winning the lottery many times in a row. But so far, we have no reason to believe life in outer space exists. Just as we have no reason to believe that there’s no advanced civilizations in the universe except for ours.