We just found 29 planets where life may be watching earth
You're gazing up at the night sky. Wow. For much of our history, we've been looking for life among these stars on the planets near them. But space has eyes too. And there's someone out there looking it up. Maybe So come your hair and smile with so far identified at least 1715 neighboring star systems in the milky way stars are located Our galaxy. So, if they were to point their telescopes at our son sooner or later, they would see something small. that passes between our home star and the observer. This is called a transit. It's a method of detecting planets and astronomy. For example, you can observe a transit phenomenon right at home with a telephone. You have to point it at the sun and wait. Then, you'll see Mercury. That's the closest planet to the sun and now you see it as a small dot transit process that can last about 5 hours. And this phenomenon happens about 14 times in a century. You'll be able to observe the next transit On November 13, 2032. Mark your calendar. Likewise, you can observe Venus, the second planet from the sun. But because it's farther away, its transits are less frequent. The last one was in 2004 and 2012. The next pair of transits is Expected in 21 17 and 21 25 hey I won't be around then so these star systems have the opportunity to observe our planet. But long-range telescopes work a little differently. Actually, the observer will not see a black. with the sun in the background Will measure the brightness of our star. When Earth begins its transit between the sun and the observer. The telescope will record a slight drop in the brightness of the star because our planet is blocking the path of the sun's rays. Those far away scientists of civilizations will be able to Calculate this drop in brightness. And determine the size of our planet. But not all 1700 plus star systems may have an extraterrestrial lawn. Scientists have narrowed it down to 29 plants. Near some of these stars. They are potentially habitable. That means these planets are rough. Earth-like in size. And within the habitable zone of their host star, the water doesn't evaporate there like in a boiling pot. And they're not too far away. So what's not too cool in the water doesn't freeze into thick sheets of ice. Hey since water is the basis of life we can assume that civilization might exist there. Theoretically, these planets could have seen earth transit in the last 5000 years. So while we were building the pyramids of Giza or Stonehenge. An extraterrestrial civilization may have been watching us. One of these planets is only 11 light-years from our home. Near the Rosh 128 star, a red door in the constellation Virgo and right in the habitable zone of its host Could see earth transit the sun on a regular basis for 2000 years. What about 900 years ago the planet lost its position and can no longer continue observation the other planet where earth can be seen transiting is 12.5 light-years away Serving our planet will open there in about 29 years. We're betting heavily on the trap as a one-star system. It hosts at least seven XO planets almost like our solar system. And for them are in the habitable zone of the star until the 16th century is Now. But we can try to make contact with these planets right now. They're all close enough to us to pick up our radio signals. Radio waves can travel through space at the speed of light. And our planet has been emitting radio signals continuously since 1895. So we're like noisy Neighbors in the radio spectrum. Within 125 light-years of us. Our radio noise would have already reached them. The only problem is it would take about the same time to get a response from that civilization. The other problem with radio Is that any civilization uses it for a relatively short period even now on earth we use Bluetooth and fiber optics more than radio and over time all the radio noise we create will simply disappear Civilization is advanced enough to use this technology. But who knows? Maybe there are life forms in space that are really different from us. Our radio signals already could have reached that planet and the moment these light Forms build tennis to receive the signal will no longer emit them. At the top is our number system then the atomic numbers Earth, the third planet from the sun is slightly elevated. This is how the extraterrestrial civilization will understand which planet this message came from. Below is a diagram of the aerobic radio telescope itself. Another option, how to deliver a message to a distant planet is to literally send a message. Meal delivery there. It could be a space pro. And we've already done that. These are voyagers one and two. They were launched in 1977 and are still operational. In 2012, Voyager won became the first-ever human-made object in interstellar space. It travels to distant stars And Terry's a message written on a golden record. The disc contains greetings in 55 earth languages. A lot of music is from different parts of our planet. Different sounds like ocean noise. Human voices and animal sounds. In addition, there are 116 images on the record. These are Pictures of people in earthly landscapes. In these pictures, there's information about the sun and RDNA. The record case contains instructions and a needle to play the record civilization can find Our solar system. The main disadvantage of sending a message this way is time. Void your one will reach its first stop. The Galice 445 stars in 40 thousand years 248 stars in 42 thousand years. And in about 296 Years. It'll pass seriously. The brightest star in the night sky. I can't wait. Also, an extraterrestrial civilization can detect us with calculations and formulas. All it takes is a little observation of the sun. Instar systems with planets, the host star doesn't stand still Around a small orbit. This is because the heavy star attracts the planet but the planet also has its own gravity and resistance. It ships the star a little and causes it to orbit around. Using such a method astronomers were able to find 548 echo planets radiation from the host star would destroy To get a response How to fly in this space. So, we have to take the first step. Although it is approximately the closest star to our solar system. It takes about 73 thousand years to travel there by conventional rocket. So, we have to learn to travel at the speed of life. But even then, it would take 4.2 years to travel there. Imagine if we found extraterrestrial life on the other side of the milky way. Our galaxy is 100 thousand light-years wide. So the journey from edge to edge would take 100 millennia of physics. Or transfer All of the human civilization to a giant spaceship that will travel from star to star for thousands of years. And when it launches from the earth, only the great great great in much greater of the first crew will be able to see another star system from the spaceship portal. Thanks for reading.
