According to a study published in Acta Astronomica, advanced aliens may already be able to see us. The study assumes that the laws of physics are largely correct and apply throughout the universe.
A BBC article suggests that alien astronomers with a 100-meter (330-foot) space telescope could be observing us right now. Even with a smaller telescope, aliens could determine that our planet is inhabited, even if it appears as a faint dot.
A paper published in arXiv analyzes how visible we are to advanced extraterrestrial civilizations, based on their technological level. A ScienceDirect article considers how visible our artificial constructions are to advanced extraterrestrial civilizations.
Taking the universality of the laws of physics, we found that the maximum distance where the detection is possible is of the order of 3000 lyand under certain conditions Type-II advanced alien societies might be able to resolve this problem
According to a study published in Astronomy, advanced aliens may already be able to see us.
Here are some other details about the study:
- The study suggests that aliens on nearby stars could detect Earth through radio signals leaked from the planet.
- Scientists from the University of Manchester and the University of Mauritius used crowd sourced data to simulate radio leakage from mobile towers.
- The study makes the case that sufficiently advanced aliens can already see us.
Acta Astronomica is a quarterly peer-reviewed scientific journal covering astronomy and astrophysics. It was established in 1925 by the Polish astronomer Tadeusz Banachiewicz
In the Alien film franchise, Xenomorphs are depicted as having elongated, domed heads with no visible eyes. However, they are believed to have a form of infrared vision that allows them to detect heat and movement in their environment
Xenomorphs also have a strong olfactory sense and possibly echolocation. They can use their infrared eyes to identify and observe objects, prey, enemies, and other Xenomorphs.
The Alien sequels and games have shown that Xenomorphs have a fisheye lens view, an echo-location like night vision, and the ability to see the aura of their enemies.
In the novelization of Alien, the character Ash speculates that the Xenomorphs “see” by way of electrical impulse, similar to a shark’s lateral line.
Aliens on nearby stars could detect Earth through radio signals leaked from the planet, new research suggests.
Scientists from The University of Manchester and the University of Mauritius used crowd sourced data to simulate radio leakage from mobile towers to determine what alien civilisations might detect from various nearby stars, including Barnard’s star, six light years away from Earth.
The Earth is already anomalously bright in the radio part of the spectrum; if the trend continues, we could become readily detectable by any advanced civilisation with the right technology.
Professor Mike Garrett
Dr Nalini Heeralall-Issur, Saide’s supervisor and Associate Professor at the University of Mauritius, said: “Every day we learn more about the characteristics of exoplanets via space missions like Kepler and the Transiting Exoplanet Survey Satellite, with further insights from the James Webb Space Telescope. I believe that there’s every chance advanced civilisations are out there, and some may be capable of observing the human-made radio leakage coming from planet Earth.”
According to research published in May 2023, advanced aliens could soon detect life on Earth through radio signals leaking from the planet.
Scientists from the University of Manchester and the University of Mauritius used crowd-sourced data to simulate radio leakage from mobile towers to determine what alien civilizations might detect.
According to Dr. Nalini Heeralall-Issur, an associate professor at the University of Mauritius, there’s a good chance that advanced civilizations exist and some may be able to observe the human-made radio leakage coming from Earth.
Only aliens with more advanced technology would be able to “eavesdrop” on the signals transmitted on Earth.
Some scientists believe that life originated on other planets because of the panspermia theory. This theory suggests that life’s building blocks, like amino acids and other organic molecules, were carried to Earth on meteorites or other space debris.
The theory also proposes that organisms like bacteria could have been transported by comets through space to planets like Earth.
However, most scientists have long assumed that life on Earth is a homegrown phenomenon. According to the conventional hypothesis, the earliest living cells emerged as a result of chemical evolution on our planet billions of years ago
Every form of life we know requires liquid water, so an exoplanet too close or too far from its host star is less likely to contain life. Additionally, ultraviolet light may be needed to form some necessary prebiotic molecules, but an overactive host star can blast the young planet, stripping away its atmosphere.
Some scientists believe that life is possible on other planets because:
- Habitable zone Every star has a “habitable zone” or “Goldilocks Zone” where the conditions are perfect for life to start.
- Right distance from the sun A planet needs to be the right distance from the sun and have the right chemicals for life.
- Water Earth has water, while other planets have ice but no liquid water.
- Chemical elements Life requires certain chemical elements like carbon, oxygen, and nitrogen. Earth has the right mix of chemicals.
- Chemical building blocks Mars is believed to have chemical building blocks, a source of water, and a source of energy from volcanoes.
However, so far scientists have not found any planets with all the features they believe are necessary to sustain life.
Earth has been leaking radio signals for over a century, and more recently, humans have been sending out radio signals to other planets.
According to the BBC, aliens might already know that humans exist if they can see our planet pass in front of the sun. This is known as a transit, and it would allow aliens to see sunlight passing through Earth’s atmosphere and identify its different gases.
According to NPR, observers in hundreds of star systems could have detected Earth sometime in the last 5,000 years.
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